NoteHomepage removal guide

There are a lot of home users that often get a computer that comes installed with the Windows 10 Home. And since Windows 10 Pro offers more features and utilities compared to Windows 10 Home, a lot of users also prefer to upgrade their Windows 10 Home computers to Windows 10 Pro. However, while doing so, a number of users reported that they encountered error 0xc03f6506 and they were not able to proceed with the upgrade. If you are one of these users, when you encounter error 0xc03f6506, you will see the following error message on your screen:

“The last product key you entered can’t be used on this copy of Windows (0xc03f6506).”

This particular error tends to occur when you go on to activate Windows 10 although it can also appear during the upgrade process. In such cases, you will see the following error message:

“Unable to upgrade your edition, We can’t upgrade your edition of Windows. Try upgrading your edition of Windows again. (0xc03f6506).”

To fix the Activation Error Code 0xc03f6506 in Windows 10, use the options provided below as references but before you proceed, make sure that you create a System Restore point first.

Option 1 – Try to use the Registry Editor

If you have already upgraded from Windows 10 Home to Windows 10 Pro and you’re having trouble with its Activation, then you might want to apply some registry tweaks to fix the problem. How? Refer to these steps:

• Tap the Win + R key combination to open the Run dialog box.
• Then type “Regedit” in the field and click OK or tap Enter to open the Registry Editor.
• Next, navigate to this registry key: ComputerHKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersion
• From there, look for a DWORD named “EditionID” and once you found it, double click on it and change its Value data to Windows 10 Professional.
• After that, look for another DWORD named “ProductName” and double click on it to change its Value data to Windows 10 Professional.
• Once you’re done, restart your computer to apply the changes made successfully.

Option 2 – Try to use Command Prompt

If the registry tweaks you applied didn’t fix the Activation error, then you can try using Command Prompt instead. Note that you can use this option in both scenarios pointed out above.

• First, you have to insert a bootable drive of the Windows10 installer.
• Next, tap the Win + X keys and select Command Prompt (Admin) from the menu.
• After opening Command Prompt as admin, navigate to the root location of the bootable drive inside the Command Prompt command line.
• Once you’re already there, type the following command and tap Enter:

setup.exe /auto upgrade /pkey <YOUR WINDOWS 10 PRO EDITION PRODUCT KEY>

After entering the command, check if it was able to fix the Windows Upgrade or Activation error 0xc03f6506. If not, refer to the next given option below.

Option 3 – Try to disable the Network Adapter

Just like the second option, you can also use this option for both the given scenarios above.

• Tap the Win + X keys and select Network Connections from the menu.
• This will open the settings for your network and on the left side panel, click on the “Change adapter settings” link. This will open Control Panel.
• From there, click on the network your computer is connected to, and then right-click on the Network Adapter that you are using and select Disable.
• After disabling the Network Adapter, try to switch to the edition of your copy of Windows 10 again and see if the problem is now fixed and don’t forget to double click on the disabled Network Adapter to get back on the Network.

If you are trying to upgrade your computer but encounter the Windows Update Error 0x800F081F – 0x20003 instead, then read on as this post will guide you in fixing this Windows Update error. This kind of error is commonly encountered when upgrading your copy of Windows 10 and is caused by errors with various developer-related settings that are being enabled in the system. When you encounter Windows Update Error 0x800F081F – 0x20003, you will see either of these error messages:

“We couldn’t install Windows 10. The installation failed in the SAFE_OS phase with an error during INSTALL_UPDATES operation: Error 0x800F081F”  “The installation failed in the Safe_OS phase with an error during apply_image operation: Error: 0x800f081f – 0x20003”

To fix this kind of Windows Update error, you need not use external programs but you can try to disable the Developer Mode, run the Windows Update troubleshooter or restart all the Windows Update-related services and components. For more details, refer to the options provided below.

Option 1 – Try to disable Developer Mode

You might have to disable Developer Mode to fix the Windows Update Error 0x800F081F – 0x20003. How? Refer to these steps:

• Tap the Win + I keys on your keyboard to open the Settings app.
• Next, go to Update & Security > For Developers.
• From there, select the toggle for Sideload apps or Microsoft Store apps located on the right-side panel.
• If you get any prompt, just click on Yes.
• After that, navigate to Apps > Apps & features and then click on Optional features on the right-side panel.
• Then scroll down to locate the Windows Developer Mode entry and select it and click on Uninstall.
• Once you’re done uninstalling the Windows Developer Mode component, close the Settings app and restart your computer to apply the changes made.

Option 2 – Try to run the Windows Update Troubleshooter

You should also try to run the built-in Windows Update troubleshooter as it could help you resolve the Windows Update Error 0x800F081F – 0x20003. To run it, go to Settings and then select Troubleshoot from the options. From there, click on Windows Update and then click the “Run the troubleshooter” button. After that, follow the next on-screen instructions and you should be good to go.

Option 3 – Try restarting various Windows Update-related services and components

• Tap the Win + X key combination and select Command Prompt (Admin) to open Command Prompt with admin privileges.
• After opening Command Prompt, copy and paste each one of the commands listed below one by one and tap Enter right after you enter each command.
  • net stop wuauserv
  • net stop bits
  • net stop appidsvc
  • ren %systemroot%SoftwareDistribution SoftwareDistribution.bak
  • ren %systemroot%system32catroot2 catroot2.bak
• Once you’ve entered all the commands given above, they will stop all the Windows Update services that are running on your computer as well as clear the SoftwareDistribution folder, and reset the Catroot2 folder. Now you have to start all these Windows Update services you’ve just stopped by executing the following commands:
  • net start wuauserv
  • net start bits
  • net start appidsvc
  • net start cryptsvc
• After that, restart your computer and try to run the setup again, and see if the error is now fixed.

This post will guide you in fixing a particular problem where your Windows 10 computer does not even let you turn it on and it appears as soon as it starts to boot the operating system and it displays an error message that says, “The Boot Configuration Data for your PC is missing or contains errors, Error code 0xc0000185”. On the other hand, it may also display a different error message saying, “The operating system couldn’t be loaded because a required file is missing or contains errors”. There are various suggestions you can try to resolve this error. You could check the physical status of your hardware or rebuild the Boot Configuration Data, use the Automatic Startup Repair or System Restore, or better yet, reset your Windows 10 computer. Since your computer will not boot, you will have to either try to get into the Advanced Startup Options screen, boot Windows 10 in Safe Mode, or use a bootable Windows 10 media to boot your computer.

Option 1 – Try to rebuild the BCD files

The first thing you can do to resolve the issue is to Rebuild Boot Configuration Data or BCD files.

• You can start by booting into the installation environment for Windows 10 from an installation media.
• After that, click on Repair your computer and on the blue screen, select Troubleshoot and then select the Advanced options menu.
• From there, select Command Prompt and once you open it, enter each one of the commands given below by sequence.
  • bootrec /FixMbr
  • bootrec /FixBoot
  • bootrec /ScanOS
  • bootrec /RebuildBcd
• Once you’re done executing the commands given above, type “exit” to close the Command Prompt window and then restart your computer and see if it fixed error code 0xc000014c.

Option 2 – Try to run Automatic Startup Repair

In this option, you need to boot your computer into the Advanced Startup Options and from there, run the Automatic Startup Repair and then wait until the process is completed.

Option 3 – Try running System Restore in Advanced Startup Options

Since you probably can’t boot into your Windows 10 computer, you can try to run System Restore again in the Advanced Startup Options.

• Boot your computer into the Advanced Startup Options screen.
• From there, you will see some options to troubleshoot when you can’t log in to Windows in the usual way.
• Now select Troubleshoot > Advanced Options > Command Prompt.
• After that, type “rstrui” and hit Enter to execute the command which will start the System Restore process.

Option 4 – Try to perform repair install by creating a Windows 10 installation media

• Click this link and then click the Download Tool Now button.
• Next, click the “Use the tool to create installation media (USB flash drive, DVD, or ISO file)…” option and follow the next given instructions on the screen.
• Now select the ISO file option in step 5.
• After that, you should now have an ISO file.
• Next, go to the location where you’ve downloaded the ISO file.
• Then right-click on the Windows 10 ISO file and select the Open with option and then select File Explorer.
• Now click on “setup.exe” and follow the next instructions that appear on the screen. When asked, you have to select either Nothing (clean install) or Keep personal files only option. Take note that you must not select the “Keep personal files, apps, and Windows settings since it doesn’t really work.

Option 5 – Try to physically check the hardware

You should also check the physical status of the hardware in your computer. You can clean the dust off the hardware components like the Network Card of the computer. You might want to use a small blower or you could also use a soft cloth and run the components gently. Make sure that you don’t damage any parts with moisture or cause harm to any circuits while you carry out this task.

0xc00d36cb error shows up when you are trying to play a video or movie using the default player in Windows. This error can occur due to a glitch in the media player or corrupted system files. in this guide, we will show you how to tackle this issue and fix it.

1. Run the video playback troubleshooter

   • Click on Start and select Settings.
   • Go to Update and Security.
   • Scroll down and open the Troubleshoot tab.
   • Scroll down and select the Video Playback option.
   • Click the Run the Troubleshooter button.
   • The troubleshooter will perform an initial scan and offer a few options.
   • Select Continue with this troubleshooter.
   • The troubleshooter will scan the system again for driver and codec issues.
   • Follow on-screen instructions and apply recommended fixes.

2. Reset the Movies and TV app

   • Click on Start and select Settings.
   • Go to Apps and open the Apps and features tab.
   • Scroll down to Movies and TV.
   • Select Movies and TV.
   • Click Advanced options.
   • Scroll down and click on the Reset button.

3. Create a new user account

   • Click on Start and select Settings.
   • Open Accounts.
   • Open the Family & other users tab.
   • Scroll down to Other users and click the Add someone else to this PC button.
   • In the Microsoft account window, type your email address.
   • If you don’t want to enter an email address and establish a local account, click on I don’t have this person’s sign-in information option instead.
   • Next, select Add a user without a Microsoft account (for a local account).
     • Else, enter your Microsoft account login details.
   • Enter a user name and password for your new account. Also, select a security question and add an answer to it.
   • Once the new profile is ready, log out of your current account.

4. Check for permission issues

   • Right-click on the problematic file and select Properties.
   • Open the Security tab.
   • Click the Advanced button.
   • In the Advanced Security Setting window, click the Change link.
   • In the Select User or Group window, enter Everyone in the text box.
   • Click the Check Names button.
   • Click OK and Apply to save the changes.
   • Close all the Properties windows.
   • Try playing the file or modifying the properties and check for any improvements.

If when trying to start Autodesk applications you receive a Network license not available error then please keep on reading, this guide is for you:

It is common to run multiple programs and applications at the same time and it’s important to be able to switch between them using their Taskbar icons or using the usual Alt + Tab shortcut. However, there are times when you might suddenly find that neither of the aforementioned methods worked and you will no longer be able to switch between programs in the Windows Taskbar. To fix this issue, refer to the options given in this post. For instance, when you have multiple instances of Microsoft Edge running and every time you press the Alt + Tab combo nothing happens so you are left with no choice but to minimize everything and then hover your mouse on the icon and switch between the instances of Edge. You will also notice that the right-click on the taskbar won’t respond back and will only keep on showing the loading circle icon. Here are a few tips you can follow to fix the issue with the Windows 10 Taskbar.

Option 1 – Try to restart the Windows Explorer

This is one of the basic things you can try as restarting Windows Explorer helps in refreshing the user interface and makes most of the things work in relation to the user interface.

• To get started, tap the Alt + Ctrl + Del keys to pull up the Windows Task Manager.
• After opening Task Manager, look for “explorer.exe” under the list of programs.
• Once you find the explorer.exe, right-click on it and click Restart.

Option 2 – Try changing the Foreground Lock Time

Aside from restarting Windows Explorer, you could also try changing the Foreground Lock Time to fix the issue with the Taskbar.

• Tap the Win + R keys to open the Run dialog box.
• Then type in regedit in the field and tap Enter to open the Registry Editor.
• Next, go to this registry key – HKEY_CURRENT_USERControl PanelDesktop
• Next, change the ForegroundLockTimeout value from200000 to 0. After that, it will make sure that no other application will take away the focus from your current program or application. It could be that some other application has taken away the focus and even when you try to actually switch, the focus gets back to the old one. Anyhow, since you already changed the value of ForegroundLockTimeout, it will ensure that the focus is not switched.

Note: If you are running some Full-Screen applications there are some devices especially the gaming ones, disable the Windows key to make sure that you won’t be able to switch. If this is the case, you need to make some modifications to the Full-Screen games.

Hello everyone and welcome to our Windows 10 security basics where we will provide you with common practices you should aim to follow in order not to cough some viruses, malware, keylogger, worm, etc. As you are all aware, we live in a digital age where we are surrounded by luxuries of unlimited information, video chats all over the globe, free calls via the internet, applications that track stuff for us, and many many more things that make our lives easier. Sadly with this kind of technology comes risks of cyber attacks that aim to steal your information, credit card numbers, or any other relevant stuff which could be used illegally in order to make purchases, loans, and other theft in your name so ones doing that could not get caught. Think of data stealers the same as you think of armed robbers in a dark alley, just this time their pray is data about your life so they can make purchases for themselves more than once. This article aims to provide you with some common logic, tips, and tricks of what should you do and where should you pay attention in order not to provide wrong people with your crucial information and data. we hope that you will find reading informative and helpful.

1. Keep Windows updated.

   Microsoft is working hard on their Windows defender and firewall to provide protection to its users and fixing any introduced security leaks which are found in Windows itself. By updating and keeping Windows updated you make sure that every security leak that is found is patched and removed from Windows and that you have the latest database of known malware inside the firewall and defender. This common practice, however, should not be limited to Windows only, you should update every application you are using for the same reasons.

2. Use antivirus, anti-malware, and firewall

   These applications exist for a reason and that reason is to protect your data. Dedicated applications specifically made for purposes of defending your data are better than any kind of I am careful mentality since sometimes is enough to just visit a website or just click on some link and you are compromised. You can use Windows Defender and firewall if you wish, they are already in Windows but if you are serious about your data and like to surf the internet some better protection is worth the investment.

3. Get a dedicated password manager

   Your password is bad, if you use the same password everywhere then it is even worse. Computers have come a long way in the last 50 years and so have cyber attack applications which make your commonsense passwords extremely vulnerable and all of your accounts open to cyber attacks. Dedicated password managers that can hash passwords and automate them are your safest bet that your passwords will not be compromised, get one, and get it today.

4. Do not click on anything inside emails

   Cyber attacks come in vast variety and one of them is sending you emails informing you that for example your Paypal or anything else has been hacked and that you must click this link to reset your password. These you do not click, no matter how convincing they sound or how good they look, if you need to update your information on a specific service or website, you delete email, open browser and go to that service and change stuff. The same goes with different offers, discounts, women seeking you, men seeking you, prince sending you 1 billion in gold. Only click on links in emails from a trusted and verified source.

5. Do not click on pop-ups

   Similar to clicking on links in emails you should not click on pop-ups, the same rules, same stuff apply as with emails.

6. Be careful what you are downloading

   Be careful from where you download your software and be careful what are you downloading and stop using pirated software, any kind of malicious applications, keyloggers, viruses, etc could be hidden in these downloads, and by downloading them you are opening doors to your private information. Only use legal software from trusted sources.

7. Never leave your phone or computer unattended

   You can never tell who can implement malicious software or get some crucial information from unattended devices, lock them all time and take them with you.

There you go, 7 common tips and tricks for the basic security of your computer. Thank you for reading and I hope to see you again on our site.

As you know, games with good graphics and fast play are definitely resource-intensive and can consume a lot of storage space on your computer. Because of that, they have to be compressed before it gets downloaded to your computer and then unpacked to the hard drive before it gets installed. However, if an error occurs in your computer’s RAM during the installation process or if your hard disk does not have enough memory to handle the process, then you might encounter the isDone.dll error which states:

“An error occurred when unpacking, Unarc.dll returned error code -1, ERROR: archive data corrupted (decompression fails).”

If you encounter the isDone.dll error message on your Windows 10 computer, then read on as this post will show you how you can fix it. This error has something to do with the incomplete installation of PC games or files of larger size. The ISDone.dll error appears due to faulty Unarc.dll file residing in the System32 folder on 32-bit operating systems and the SysWOW64 folder on 64-bit systems. So, if you see this error message, then, it means your computer was not able to read installation archive files.

What is Unarc.dll file?

Unarc.dll is a dynamic link library for Windows. Some applications or games require this file to function properly. So, if it goes missing or, an error occurs when you start a game or an application, you may get various kinds of errors. ISDone.dll error while playing games on PC

Option 1 – Try to reinstall the game

The isDone.dll error could also be caused by the installation of an unknown application. Or it could also be caused by an outdated or corrupted application. In other words, if the game you are trying to install is broken or corrupted, then it’s no wonder why you’re getting the isDone.dll error. To fix this, make sure that you download the latest updated version of the game and then try to install it again and see if the problem is resolved or not.

Option 2 – Try to re-register the .dll file using the Regsvr32 tool

• The first thing you have to do is to locate the DLL file named dll on your computer and rename it to Unarc-bak.dll.
• Next, copy the Unarc.dll file from another well-functioning computer and save it on your desktop.
• After that, move the DLL file you just copied to the System32 folder if you are using a 32-bit operating system, or the SysWOW64 folder if you are using a 64-bit operating system.
• Now you have to register the new DLL file and you can do that using Windows PowerShell.
• Open Windows PowerShell and then execute this command if you have placed the DLL file in the System32 folder: regsvr32 %systemroot%System32unarc.dll
• On the other hand, if you have placed the DLL file in the SysWOW64 folder, then execute this command: regsvr32 %systemroot%SysWOW64unarc.dll
• Once you’re done, a message will be displayed saying that the DLL file was registered.
• Restart your computer and check if the problem is now fixed.

Option 3 – Troubleshoot the isDone.dll error in a Clean Boot State

You can also troubleshoot the isDone.dll error in a Clean Boot state. It could be that there are some third-party applications in your computer that're preventing the application from getting installed and to isolate this possibility, you need to boot your computer in a Clean Boot State and then try installing the program again. Putting your computer in this state can help you identify which program is the culprit and thus isolates the problem. In a Clean Boot state, your computer will start using only the pre-selected minimal set of drivers and startup programs. Note that you have to disable and enable one process at a time.

• Log onto your PC as an administrator.
• Type in MSConfig in the Start Search to open the System Configuration utility.
• From there, go to the General tab and click “Selective startup”.
• Clear the “Load Startup items” check box and make sure that the “Load System Services” and “Use Original boot configuration” options are checked.
• Next, click the Services tab and select the “Hide All Microsoft Services” check box.
• Click Disable all.
• Click on Apply/OK and restart your PC. (This will put your PC into a Clean Boot State. And configure Windows to use the usual startup, just simply undo the changes.)
• After you’ve set your computer into a Clean Boot State, make sure that you’re signed in as administrator and then try to install the application again.

Option 4 – Try updating or reinstalling your Graphics drivers

Updating or reinstalling the Graphics drivers in your computer can also help in resolving compatibility issues between the operating system and the driver that might have caused the isDone.dll error.

• First, boot your computer into Safe Mode.
• After that, tap the Win + R keys to launch Run.
• Type in devmgmt.msc into the box and tap Enter or click OK to open the Device Manager.
• After that, a list of device drivers will be displayed. From there, look for the Display Adapters and click on them.
• After that, right-click on each entry under the Display Adapters and select the “Uninstall Device” option from the menu.
• Now restart your computer.
• After restarting your computer, go to the Settings app and Check for Updates in the Windows Update section.

Note: You also have the option to go directly to the website of your graphics card manufacturers like NVIDIA, Intel, or AMD and go to the section called Drivers then check if there’s a new available update – if there is, download and install it.

Option 5 – Try scanning your computer using Windows Defender

The isDone.dll error might also be infected with malware or virus and to eliminate it, you have to scan your computer using security programs like Windows Defender.

• Tap the Win + I keys to open Update & Security.
• Then click on the Windows Security option and open Windows Defender Security Center.
• Next, click on Virus & threat protection > Run a new advanced scan.
• Now make sure that Full Scan is selected from the menu and then click the Scan Now button to get started.

You have probably heard a lot of good things about gaming mice, how they are better feeling, better in any way possible and it is all true, everything you heard is actually true, they are superior in any way to a regular mouse but with one big disadvantage, and that would be the price. While you can find a regular mouse for pocket change, a gaming mouse is in comparison very expensive even for entry-level ones.

In this article we will explore all advantages and compare it with the regular one so you can come up with your own conclusion about do you really need one for yourself or if you are fine with regular.

Price

As stated price is one factor that does not favor gaming mice. Regular mouse for a personal computer goes around 10 or 20 USD, while entry-level in gaming one will be 40 USD and can go up to 250 USD, this large gap in price is usually determining factor why people pick up regular one. If you are on a really tight budget go for the regular one, but if you can afford a gaming one get it without second thoughts.

Software

This is where you will see the big difference between mice. Regular ones when connected are recognized and the driver is automatically installed and you can use it, same goes with gaming ones but with one big difference, you have an option to install additional manufacturers' software specially tailored for your mouse. In the application, you will be able to access some features that are specific to the mouse model that you could not set in typical Windows mouse properties. Beside more options software can also have features like setting your profiles and saving them to be recalled when you need them on the fly.

Sensitivity of mouse

The sensitivity of the mouse is measured in dots per one inch or short DPI, this is directly shown on your screen by how fast your mouse can move, higher sensitivity means your mouse will move faster across the screen and lower means it will move slower. All gaming mice come with buttons and settings that will allow you to change DPI on the fly and you can choose precise DPI settings in the software.

The regular mouse comes with DPI around 800 and goes to 1200 typically and does not have usually the option to change this while gaming mice start at 400 and can go as high as 26000 with the option to change it. Some regular mice can have only 1 option of DPI, usually very cheap ones.

Polling rates in mice

Pooling rate is the measurement of how often your mouse reports where it is positioned on the computer. The higher the pooling rate, the more responsive your mouse will be and vice versa. It is measured in hertz (Hz) and regular mice have them around 125Hz that is enough if you are using a computer for office, internet, and mail work.

If you are working in design or gaming you will need more than 125Hz polling rate, luckily gaming mice come with a minimum of 500Hz as an entry point and some hi-end models are going as far as 8000Hz. This very high pooling rate will get some extra load on your CPU but the mouse itself will be maximally responsive and will respond even to the smallest moves.

Ergonomics

Regular mice are well just mice, they are typical shape and size, gaming mice are made with ergonomics in mind. How they are made for extensive daily use of several hours per day they are constructed in a way to offer a pleasant and pain-free experience.

If you work on a computer for long periods of time consider gaming an ergonomic mouse since it will take the strain from hands and place them in a more natural position.

Macro keys

Gaming mice most of the time come with more keys compared with regular ones and good thing is that via its software you can tie certain actions to these extra keys making work or gaming more pleasant and quicker.

Components and material quality

In order to make regular mice more affordable and cheaper materials and quality of components had to suffer. Gaming mice have millions of guaranteed clicks by companies that make them before they break and regular ones usually do not guarantee a single one. This is due of course quality of materials that have been used in constructing these devices.

In the long term, if you use a gaming mouse for typical daily tasks it will outlive your regular one and on the side offer you more pleasant and responsive use along the way.

Mail and Calendar not working with Cortana? As you know, Cortana was first launched way back in 2014 with an emphasis on its tight integration with both the Windows Mail and Calendar apps. This integration has been one of the highlighting features of this Personal Digital Assistant. However, there are some users who reported that the Calendar and Mail integration with Cortana is not working on their Windows 10 computers. This kind of problem could be due to several factors like the loose integration between the services, incompatible versions of the components, and many more. According to the users who experienced the issue, the features affected are the syncing of calendar appointments, sending emails via Cortana, and so on. To fix this problem, there are several options you can try. You can try to restart Cortana’s processor run the Windows Store Apps troubleshooter. You could also try to relink your Microsoft account or reinstall the Mail and Calendar apps, as well as reinstall Cortana.  For more details, follow the suggestions given below.

Option 1 – Restart Cortana’s process in the Task Manager

Restarting Cortana’s process in the Task Manager could also help you resolve the problem. Refer to the steps given below to do so.

• Tap the Ctrl + Alt + Del keys to open the Security options window.
• From there, look for the Task Manager in the given list and open it.
• Next, look for the process of Cortana and right-click on it, and then select the End Task option to end its process.
• After that, the Cortana process will restart by itself and re-initialize.

Option 2 – Run the Windows Store App troubleshooter

The Windows 10 Store Apps Troubleshooter will help you in fixing the Web Preview problem in Cortana. This is a great built-in tool from Microsoft that helps users fix any app issues. To use the Windows Store Apps Troubleshooter, follow the steps below.

• Tap Win + I keys again to open the Windows Settings panel.
• Go to Update & Security and then go to Troubleshoot.
• Under the Troubleshoot section, on your left-hand side, scroll down to find Window Store Apps.
• Then click on the Run the troubleshooter option and follow the on-screen instructions and then see if it fixes the problem.

Option 3 – Try to relink your Microsoft Account

You might also want to relink your account in Microsoft using the Windows 10 Settings app.

• Open the Windows 10 Settings app.
• Next, navigate to Accounts > Email & Accounts and from there, go to the section of Accounts used by Email, Calendar, and Contacts.
• After that, select your email account and select Manage.
• Once done, a new panel will come up where you have to click on the “Delete account from this device” link.
• Once you get a confirmation, select Delete and then relink the same account. This should resolve the problem.

Option 4 – Try to reinstall or update the Mail and Calendar apps

• Open Windows PowerShell as admin.
• Next, execute this command: Get-AppxPackage *windowscommunicationsapps* | Remove-AppxPackage
• Once done, restart your computer and go to the Microsoft Store page to get the latest updates for both Windows Mail and Calendar apps.

Option 5 – Try to reset Cortana via Settings

• Launch the Windows 10 Settings app and go to Apps > Apps & Features.
• Next, look for the entry of Cortana on the right-side panel and select it.
• After that, select the Advanced options and then select the Terminate button under the Terminate section.
• Once done, click on the Reset button under the Reset section.
• Restart your PC.
• After your computer boots, launch Cortana again and check.

Option 6 – Try to reinstall Cortana

If none of the options given above works, you must consider reinstalling Cortana.

• First, right-click on the Taskbar and select the Task Manager.
• Next, select File menu > Run new task and type “Powershell” in the field and then select the “Create this task with administrative privileges” option.
• Click on OK to open the PowerShell console.
• After that, type the following command and hit Enter to execute it:

Get-AppXPackage -Name Microsoft.Windows.Cortana | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)AppXManifest.xml"}

• Restart your computer and check if the problem is now fixed.