How to Use and Configure Active Hours

As you know, the functioning of the Windows Sandbox feature is supported by various components in the background of the Windows operating system. And the only way for you to enable the Windows Sandbox feature in your computer is through the Turn Windows features on or off utility. This feature will work directly on the basis of Virtualization which is also supported by Hyper-V. However, there are some reports claiming that some computers have the Windows 10 Sandbox item greyed out in the Turn Windows features on or off utility. Thus, in this post, you will be guided on what you can do to resolve such a problem in your Windows 10 computer. In this kind of problem, you should know that this has something to do with the Second Level Address Translation which is one of the important pillars of how the Windows 10 Sandbox feature functions. Thus, if the Second Level Address Translation or SLAT feature in Windows Sandbox is not supported by the CPU of your computer, there is no way for you to use Windows Sandbox on your computer. On the other hand, if SLAT is supported, then there is definitely something you can do to resolve the greyed-out Sandbox item in Windows 10.

To get started, follow the steps provided below.

Step 1: First, you have to boot into the BIOS of your PC. Step 2: After that, make sure that the following options are set to their respective configurations:

• Hyper-V – Enabled
• VM Monitor Mode – Yes
• Virtualization – Enabled
• Second Level Address Translation (VT-d or RVI) – Enabled
• Data Execution Prevention – Enabled

Step 3: Once you’re done, save the configuration and then restart your Windows 10 computer as usual. Step 4: Once your computer has restarted, you should see the same option in the Turn Windows features on or off utility and it should no longer be greyed out. Then you can now enable the feature and follow the onscreen instructions need to use the feature as best as you can.

What is QTCF.dll Error?

Sometimes you may experience QTCF.dll error on your computer either during installation or while upgrading applications like iTunes and QuickTime. This error indicates that the installation or the upgrading of the desired application was unsuccessful. The QTCF.dll error is recognized by the Apple Support Community and they have provided a solution to fix this error easily.

Solution

Error Causes

QTCF.dll error occurs because the computer overloads with too much data which corrupts and damages registry files. And therefore the desired program fails to download and start on your PC. When this happens you see a pop up on your screen and the QTCF.dll error message that is usually displayed as:

• QTCF.dll not found
• QTCF.dll file is missing

Such message display hinders your ability to use iTunes or QuickTime applications on your PC. Furthermore, it also slows the performance of your system and you may encounter startup and shutdown problems. Therefore, it is advisable to repair the problem and fix the QTCF.dll error right away.

Further Information and Manual Repair

The good news is that you don’t need to go to a professional or be an IT expert in order to fix the QTCF.dll error. Since this error means that the installation or the attempt to upgrade the system was unsuccessful therefore you need to reinstall the fresh copy of the application. Here’s how you can easily fix the problem by yourself and install a fresh copy of the application: Step 1: First close all the applications running on your computer. Step 2: Now uninstall the application that you were trying to install such as iTunes or QuickTime.  To do this, go to the start menu, click on settings, control panel, and programs. Now click on the application you want to remove. Step 3: Once the application is uninstalled and removed from your computer, then restart it again. Step 4: Now download a fresh version of the application (iTunes or QuickTime) from Apple’s official website http://www.apple.com/quicktime/download/. Step 5: Run the installer. If reinstalling doesn’t work, then it is advisable to download the QTCF.dll repair tool. This repair tool will scan your PC for errors in seconds. Once the scanning is complete, click on the ‘fix all’ button to repair your computer. Once the error is fixed, restart your computer and then try reinstalling the desired application one more time.

A Word of Advice

For regular PC users, it is advisable to install an anti-virus and malware scanner and run it every time you use your computer. This helps you keep informed about the viruses or errors that your computer might be exposed to. And you can take timely actions before you experience file corruption and damage.

FromDocToPDF Toolbar is a browser extension published by Mindspark InteractiveNetwork, that usually comes bundled with other potentially unwanted programs. The toolbar is distributed heavily through advertising networks.

This toolbar automatically sets your default search engine to MyWebSearch, it also sets your new tab to the DocToPDF welcome page. This toolbar ads startup registration tasks that allow it to start automatically with Windows, it gathers website traffic, clicks, data, and personal information and sends it to its ad network. Multiple anti-virus programs have detected FromDocToPDF as a browser hijacker and therefore is potentially unwanted and recommended for optional removal

About Browser Hijackers

Browser hijacking is actually a form of unwanted software, commonly a web browser add-on or extension, which causes modifications in the web browser’s settings. Browser hijacker malware is developed for numerous reasons. Often, hijackers will force hits to internet sites of their preference either to increase traffic producing higher advertisement earnings, or to gain a commission for every user visiting there. While it might seem naive, these tools were created by vicious individuals who always attempt to take full advantage of you, so that they could make money from your naive and distraction. Furthermore, hijackers could make the whole infected system vulnerable – other dangerous malware and viruses will seize these opportunities to get into your computer system very easily.

Key signs that your web browser has been highjacked

There are several signs that could indicate a browser hijacking: home-page is changed; you see new unwanted favorites or bookmarks added, typically directed to ad-filled or porn websites; the default online search engine is changed and your browser security settings have been cut down without your knowledge; unwanted new toolbars are added to your browser; your browser will display constant pop-up ads; your web browser starts running slowly or exhibits frequent errors; You can’t access specific sites, in particular anti-malware websites.

Precisely how browser hijacker infects PCs

A browser hijacker could be installed on your PC when you visit an infected website, click on an email attachment, or download something from a file-sharing website. Many browser hijackings originate from add-on applications, i.e., browser helper objects (BHO), toolbars, or plug-ins added to browsers to give them additional functionality. A browser hijacker could also come bundled up with some free software that you unknowingly download and install, compromising your PC security. Typical examples of browser hijackers include CoolWebSearch, Conduit, OneWebSearch, Coupon Server, RocketTab, Delta Search, Searchult.com, and Snap.do. The presence of any browser hijacker on your system might significantly diminish the browsing experience, track your online activities that lead to serious privacy concerns, degrade overall system efficiency, and lead to software instability also.

Tips on how to get rid of browser hijackers

Certain browser hijacking could be simply stopped by discovering and eliminating the corresponding malware application through your control panel. However, most hijackers will be more difficult to locate or eliminate as they might get themselves connected with some important computer files that enable it to operate as a necessary operating system process. Novice computer users should never try for the manual form of removal, as it demands comprehensive system knowledge to carry out fixes on the system registry and HOSTS file.

How One Can Get rid of a Virus that is Blocking Websites or Preventing Downloads

Malware could cause all kinds of damage if they invade your computer, starting from stealing your private details to deleting data files on your computer. Some malware sits in between your computer and the internet connection and blocks a few or all websites that you would like to check out. It might also prevent you from installing anything on your PC, particularly anti-malware software. If you are reading this now, you may have perhaps recognized that virus infection is the reason behind your blocked net traffic. So what to do if you want to download and install anti-malware software like Safebytes? Although this kind of issue will be harder to circumvent, there are some actions you can take.

Download the antivirus in Safe Mode with Networking

If the malware is set to load at Windows startup, then booting in Safe Mode should prevent it. Since just the minimum programs and services start-up in “Safe Mode”, there are seldom any reasons for conflicts to take place. You will have to do the following to get rid of malware in Safe mode. 1) At power on/start-up, tap the F8 key in 1-second intervals. This should bring up the Advanced Boot Options menu. 2) Select Safe Mode with Networking using arrow keys and press Enter. 3) When you are into this mode, you should have access to the internet once again. Now, make use of your web browser normally and go to https://safebytes.com/products/anti-malware/ to download Safebytes Anti-Malware. 4) After the application is installed, allow the scan run to eliminate trojans and other threats automatically.

Switch to some other internet browser

Some malware only targets particular web browsers. If this is your situation, employ another internet browser as it might circumvent the malware. If you’re not able to download the antivirus software using Internet Explorer, this means the virus is targeting IE’s vulnerabilities. Here, you need to switch over to another web browser such as Chrome or Firefox to download Safebytes software.

Create a portable USB antivirus for removing viruses

Another solution is to create a portable anti-malware program on your USB stick. To run anti-malware using a flash drive, follow these simple steps: 1) Download Safebytes Anti-Malware or MS Windows Defender Offline onto a clean computer system. 2) Plug the USB drive into the uninfected computer. 3) Double-click on the downloaded file to open the installation wizard. 4) Choose a USB drive as the place when the wizard asks you exactly where you intend to install the application. Follow the instructions on the screen to finish off the installation process. 5) Transfer the flash drive from the uninfected computer to the infected computer. 6) Double click the Safebytes Anti-malware icon on the thumb drive to run the program. 7) Click on “Scan Now” to run a scan on the infected computer for viruses.

Ensure the Safety of Your PC by Installing SafeBytes Anti-Malware Software

If you are planning to purchase anti-malware for your laptop or computer, there are lots of brands and packages for you to consider. A few of them do a good job in getting rid of threats while some will harm your PC themselves. You should look for a product that has obtained a good reputation and detects not just computer viruses but other kinds of malware as well. One of the recommended software programs is SafeBytes Anti-Malware. SafeBytes carries a superb track record of top-quality service, and customers are very happy with it. SafeBytes is a powerful, real-time anti-malware application that is designed to assist the everyday computer end user in safeguarding their computer from malicious internet threats. With its cutting-edge technology, this software will let you remove multiples types of malware including viruses, trojans, PUPs, worms, ransomware, adware, and browser hijackers. SafeBytes anti-malware comes with a plethora of enhanced features that sets it apart from all others. Let’s take a look at a few of them below: Live Protection: SafeBytes gives real-time active supervision and protection from all known viruses and malware. It’ll constantly monitor your laptop or computer for hacker activity and also provides users with superior firewall protection. World-class AntiMalware Protection: Built upon a greatly acclaimed antivirus engine, this malware removal application can find and remove many obstinate malware threats like browser hijackers, PUPs, and ransomware that other common antivirus applications will miss. Quick Multithreaded Scanning: SafeBytes’s very fast malware scanning engine reduces scan times and extends battery life. At the same time, it’ll effectively identify and eliminate infected computer files or any online threat. Web Protection: Safebytes allots all sites a unique safety ranking that helps you to get an idea of whether the website you’re about to visit is safe to view or known to be a phishing site. Lightweight: SafeBytes is a lightweight and easy-of-use antivirus and antimalware solution. As it utilizes very low computer resources, this application leaves the computer power exactly where it belongs to: with you. 24/7 Live Expert Support: You can get 24/7 technical support to immediately resolve any issue with your security software.

Technical Details and Manual Removal (Advanced Users)

If you wish to manually remove FromDocToPDF without the use of an automated tool, it may be possible to do so by removing the program from the Windows Add/Remove Programs menu, or in cases of browser extensions, going to the browsers AddOn/Extension manager and removing it. You will likely also want to reset your browser. To ensure the complete removal, manually check your hard drive and registry for all of the following and remove or reset the values accordingly. Please note that this is for advanced users only and may be difficult, with incorrect file removal causing additional PC errors. In addition, some malware is capable of replicating or preventing deletion. Doing this in Safe Mode is advised.

The following files, folders, and registry entries are created or modified by FromDocToPDF

What is Error 0x80010108?

Error 0x80010108 is a Windows Live Photo Gallery error. This error prevents the Windows PC user from viewing photos. The error code is often displayed in the following format:

‘An error is preventing the photo or video from being displayed’ Error code 0x80010108

Solution

Error Causes

The error 0x80010108 occurs due to multiple reasons including:

• The issue in Windows Live Essential Settings

This error occurs while using Windows Photo Gallery but it is actually related to the Windows Live Photo Viewer within the Windows Live Essentials software.

• Viral Infection
• Registry Issues

To view the photos on your Windows PC, it is advisable to fix the problem right away. Furthermore, you should also not delay in fixing this problem especially if the underlying causes are related to the registry or viral infection. These can pose serious system and security threats including system failure, crash and data breaches.

Further Information and Manual Repair

To resolve this error on your system, you don’t always have to hire a technical expert or be a technical whiz yourself. Here are some easy and effective methods to resolve error 0x80010108 on your PC immediately:

Method #1

To repair Windows Live Essential Software Settings, go to the start menu and then click the control panel. Now in the control panel go the option Programs. In the programs click the tab programs and features and then select Windows Live Essentials and click repair tab. Once the settings are repaired, restart your PC to activate changes.

Method #2

Go to the start menu and type regedit.exe and then press enter. Type the following key: HKEY_CLASSES_ROOT WindowsLive.PhotoGallery.bmp.15.4 shell open DropTarget then right-click DropTarget and then Rename. Prefix a hyphen so that it becomes “-DropTarget”. Now type the following for each GIF/ICO/JPG/PNG/TIF file types: HKEY_CLASSES_ROOTWindowsLive.PhotoGallery.gif.15.4 shellopen DropTarget HKEY_CLASSES_ROOT WindowsLive.PhotoGallery.ico.15.4 shell open DropTarget HKEY_CLASSES_ROOT WindowsLive.PhotoGallery.jpg.15.4 shell open DropTarget HKEY_CLASSES_ROOT WindowsLive.PhotoGallery.png.15.4 shell open DropTarget HKEY_CLASSES_ROOT WindowsLive.PhotoGallery.tif.15.4 shell open DropTarget

Method #3

Download Restoro on your PC to scan for both registry issues and malware. Restoro is a multi-functional PC Fixer embedded with utilities like a powerful registry cleaner, an antivirus, and a system optimizer to name a few. The registry cleaner scans and detects all registry-related issues. It removes all unnecessary files damaging the registry and corrupting the registry settings. Simultaneously, the antivirus removes all kinds of malicious software affecting your PC including spyware, viruses, and Trojans. The system optimizer feature ensures that your PC works at the optimal level and does not slow down during and after the cleaning process. Restoro is efficient and safe. It has a user-friendly interface and simple navigations which makes it quite easy to operate. It can be downloaded on all Windows versions including. Click here to download Restoro to resolve error 0x80010108.

Kernel_Data_Inpage_Error - What is it?

Kernel_Data_Inpage_Error is a BSOD (blue screen of death) error. Also, know as a 0x0000007A Stop error. This bug check indicates that the requested page of kernel data from the paging file failed to be read into memory. In simple words, this means that Windows has trouble reading from the memory. This can apply to both kinds of memory: stored memory on your hard drive and also the dynamic memory in your RAM. The Kernel_Data_Inpage_Error turns your computer screen all blue, stops the program being executed, and sometimes even leads to abrupt system shut down.

Error Causes

Kernel_Data_Inpage_Error may occur due to numerous reasons. The exact cause of this error can easily be found by going through the code displayed in the parameter of 0x00000007A. Let’s take a look at Kernel_Data_Inpage_Error parameter codes and the underlying causes of its occurrence:

• 0xC0000009A- This parameter code triggers missing nonpaged pool resources
• 0xC0000009C- This represents the installed hard disk drive has bad sectors.
• 0xC0000000E- This indicates a hardware failure or an incorrect drive configuration

Further Information and Manual Repair

No matter what the cause for Kernel_Data_Inpage_Error may be, it is advisable to fix it immediately as blue screen of death error codes are considered to be critical PC errors that can cause serious damages and even result in valuable data loss. Here are a couple of ways to repair this issue on your system:

1. Call the ‘Chkdsk’ (check disk) command on your system.

Windows XP, Vista, and 7 users can call this command, by pressing Windows Key +F and type in ‘chkdsk’ and run. However, you can’t run it while actively using Windows but you can always schedule it to start automatically the next time your computer turns on. Wrap up what you need and then reboot. Chkdsk disk checking process can take a long time, especially on large and slow hard drives. To run this command on Windows 8, open Windows search by pressing Windows Key+ F and then type ‘cmd’. Then right-click on the command prompt and choose the option ‘Run as Administrator’. To continue with the disk checking process, here you will be prompted to provide your administrator authentication. Once you insert the administrator authentication, type the command ‘Chkdsk C:/f/r/x” where the letter ‘C’ indicates the drive you want to examine and repair. Run it to scan for Kernel_Data_Inpage_Errors on your system. Chkdsk command will detect and repair errors on the hard drive and then automatically reboot.

Limitations to this Solution:

‘Chkdsk’ is a value-adding inbuilt disk checking tool in PC new Window versions; nonetheless, this command has certain limitations. It is time-consuming. You may have to wait for a long time for it to scan your system. Also when disk check is running, you will have to stop all other activities on your system. Furthermore, Chkdsk does not scan and fix all registry errors and other PC-related errors. So, you can’t be 100% sure that it will resolve all the Kernel_Data_Inpage_Errors on your PC.

What is Error C00D1199?

This is a typical Windows Media Player error code. Developed by Microsoft, Window Media Player is a media player and media library application that is used for playing audios and videos on the computer. Error C00D1199 appears when Windows Media Player is unable to play the file requested by you. The error code is displayed in the following format:

C00D1199: Cannot play the file

Solution

Error Causes

You might encounter an error C00D1199 message on your PC for one of the following reasons:

• The file type you requested is not supported by the Windows Media Player
• The file type was not compressed by using a codec that is not supported by the Player
• Your sound card or controller is not configured properly or outdated
• Registry corruption

The good news is that error C00D1199 is not fatal. But if this error code is generated due to registry problems, then it can lead to serious issues. Therefore it is advisable to fix it immediately.

Further Information and Manual Repair

Here are some of the best and easy do-it-yourself methods to resolve the error C00D1199 right away.

Method 1 - Ensure File Type is Supported by Windows Media Player.

If it is supported then make sure the codec used to compress the file is installed on your system. There are hundreds of audio and video Codecs in use today but the most popular Codecs used on Windows Media Player are Windows Media Audio, Windows Media Video, and MP3. If these Codecs are not installed on your PC, then it is advisable to download them from the web. But make sure you download these codecs from a reliable and a trusted website.

Method 2 - Check Sound Card Settings

Another method to resolve error C00D1199 is to check Sound card settings. Make sure it is configured properly. Improper configuration can also trigger the error. Nonetheless, if it is configured the right way but the error still persists then it is advisable to change update the driver. To do this, go to the Device Manager. Here use the Driver update wizard to make updates.

Method 3 - Check the Windows Registry

The registry is an important part of the PC. It stores all the activities performed on the PC and all files including both junk and important files. If unnecessary files like junk files, cookies, and bad registry entries are not removed frequently from the registry, it can corrupt and damage it and generate error codes like C00D1199. To clean the registry and resolve the error it is advisable to download Restoro. This is a user-friendly PC Fixer embedded with a registry cleaner. The registry cleaner wipes away all the clutter from the registry and cleans it instantly. It also repairs the damaged files and restores the registry. Click here to download Restoro and resolve error C00D1199 on your PC.

The speed at which the CPU runs varies depending on any Windows laptop or desktop. And in case you don’t know, the CPU does not run at full speed all the time as it depends on how the operating system distributes the load so it works accordingly. However, there are instances when it runs at full speed especially if your Windows 10 computer is on a heavy workload. But if you find that even when your computer is already on a heavy workload and the CPU is still not running at full speed, then you need to look into this situation. To verify that your CPU’s speed, you can use any CPU stress test tool. This kind of issue is common on laptops compared to desktop computers since laptop runs on battery. The Intel Processor on laptops uses the Speed Stepping Technology which means that when you are doing some small tasks on your laptop, the processor’s speed is reduced. On the other hand, if this happens when you are using a heavy application, it can be due to a low charge on the laptop’s battery. Thus, Windows will try its best to keep the computer running for as long as possible by reducing the CPU speed or processor. But there are times when you are ready to sacrifice battery to make sure that the work gets done on time. To achieve that, here are some options you can check out.

Option 1 – Try setting the processor state to the maximum in Power Options

• Type “control” in the search box to view the classic Control Panel as well as the popular options.
• Next, click on Power Options > Change plan settings > Change advanced power settings.
• Then navigate to Processor power management > Maximum processor state.
• Now select 100% when it is on Battery and Plugged in.
• After that, expand the System cooling policy option and make sure to set it as Active to make sure that the battery won’t overheat.
• Finally, apply the changes made to all the profiles of the power management and restart your computer. This will ensure that your CPU will run at maximum power at all times.

Option 2 – Try to update or disable the Intel Power Management driver

The next option you can try is to update or disable the Intel Power Management driver. The Intel-powered computers have dedicated software that controls CPU speed and Fan speed when it needs to save battery. You can try disabling it temporarily and check if there are any changes with the CPU fan speed.

• First, restart your computer by holding the Shift key to boot your computer into Troubleshooting or Advanced mode.
• Next, go to Troubleshoot > Advanced Options > Command Prompt.
• Then change the directory to C:/Windows/System32/driver and then rename the file named “Intelppm” by entering the “ren intelppm.sys intelppm.sys.bak”.
• Now restart your computer.

Note: If you were not able to find the drivers in C:/Windows/System32/driver, check if they are available under C:/Drivers/IntelPPM. After that, the CPU speed should change now with the Intel driver missing from the system. And in case you want to enable it, simply follow the same steps given above and rename the file again.

Option 3 – Try disabling the IPPM using the Command Line or Registry Editor

• Command Prompt:
  • Tap the Win + R keys to open the Run dialog box and type “cmd” and tap Enter to open Command Prompt.
  • Next, type this command and hit Enter: sc config intelppm start= disabled
  • The “sc config” command you entered modifies the value of a service’s entries in the registry as well as in the Service Control Manager database.
• Registry Editor:
  • Tap the Win + R keys to open the Run dialog box and type “Regedit” in the field and hit Enter to open the Registry Editor.
  • Next, navigate to HKEY_LOCAL_MACHINESYSTEMCurrentControlSetServicesintelppm.
  • From there, double click on the intelppm and change the Start key value to
  • Now close the Registry Editor and reboot your computer.

Note: The steps given will make sure that the CPU will run at maximum power at all times.

Microsoft starting as of today will block its Office 365 users if they are using Internet Explorer or early versions of Edge browsers. So if you are using older non Chromium Edge versions of Microsoft browsers you can no longer access Office services until you switch. Now normally I would fully support this kind of decision since Internet explorer is a slow and vulnerable browser and the edge is similar in that regard. The new edge browser is great and it should be used but the issue I have is that Office 365 is not free, it is a premium feature and I am wondering how Microsoft plans to deal with people that have already paid for service but suddenly cannot access it anymore.

Microsoft will soon offer 4 CPU computer specifically aimed at developers and its name is Volterra. The machine as stated will come with 4 processors but the strange thing is that they will be ARM-based instead of x86.

CEO of Microsoft, mister Satya Nadella has introduced the product and Microsoft has released a youtube video promoting it.

https://youtu.be/yICVNta8jMU

The computer system will have Qualcomm's NPU or built-in neural processing unit to use AI's power to help developers write and produce better and faster code. The sad news is that besides processors used there is no other information on other components that will go into this system.

As seen in the video, the computer reminds me a lot of the apple MAC mini with its size and design, and as stated it is made from recycled plastic which in our opinion will bring the price under $1000.

Microsoft has not provided an official price tag for Volterra, but our hope is that it will be more affordable than building your own development PC. Also, there was nothing said about computer availability, we suspect that the selling model will be typical Microsoft one with first models available only in the USA and moving forward slowly opening it to other markets.

Volterra specifications

As previously said nothing except the number of CPUs and their type has been officially said but we managed to get some information about some other specific things not including its inside components.

The unit will have a fan inside of it for cooling purposes and better performance and that is what was officially stated by Microsoft. On the outside, it is known that the computer will have three USB-A ports, a mini DisplayPort, and an ethernet input. All of these will be positioned on the back of the device, on its left side there will be two USB-C ports.

The unit itself will be running on Windows 11 but it was not disclosed anything about the version, we presume since this is a model aimed for professional use that it will come with Windows 11 PRO version.

Currently available tools for ARM

Since this product is aimed at developers logically support for developing software is a must-have and at the time of this writing software that will come and that will run on Volterra is:

• Visual Studio 2022
• Visual Studio Code
• Visual C++
• Modern .NET 6 & JAVA
• Classic .NET
• Windows Terminal
• Windows Subsystem for Android
• Windows Subsystem for Linux

Conclusion

Once MAC studio has been released it showed that specific builds have their audience and can be sold for less of a price than full-fledged custom-made workstations. There is no doubt that Microsoft Volterra will find its audience but will that be enough to have more versions of this compact computer only time will tell.

The error code 0X8019019A is shown when a user fails to add his Yahoo account to the Mail app due to the outdated or corrupt installation of the Mail app. Not using an App-specific but a normal Yahoo account password may also result in the error at hand. In this guide, we will show you how to effectively fix this error so you can set up Yahoo mail.

1. Reboot PC

   Perform a restart of your system to rule out a temporary glitch in the system. Also, check if you can successfully access your email through a web browser using the same credentials as you are using with the Mail app. Additionally, make sure that no VPN or proxy server is being used to access the internet (VPN/proxy may work fine with the web version of Yahoo mail but may hinder the access through a mail client).

2. Update Windows and the Mail App to the Latest Build

   If your system is not updated to the latest build it can create incompatibility between the OS modules. Updating the Windows and Mail app of your system to the latest build may solve the problem.

3. Re-add the Yahoo Account to the Mail App

   The Yahoo account issue could be a result of a temporary glitch in the communication modules of the system. The glitch may get cleared if you remove and then re-add the Yahoo account to the Mail app.

4. Reset the Mail App to the Defaults

   You may fail to add the Yahoo account to the Mail app if the installation of Mail itself is corrupt. In this scenario, resetting the Mail app to the defaults may solve the problem.

5. Generate an App Password and Use it to Add the Yahoo Account to the Mail App

   Yahoo has implemented tons of security features to its accounts. One such feature is the use of app-specific passwords for less secure apps like the Mail app. If your Yahoo username or password is not working with the Mail app, then using the App-specific password may solve the problem.