How to avoid errors in Windows

Error Code 0xC1900101, 0x20017 – What is it?

Error code 0xC1900101, 0x20017 in Windows 10 occurs when Windows users attempt to upgrade to Windows 10 but fail to complete the installation process. This Windows error code may occur due to issues with a third-party antivirus program or problems related to a driver or hardware. When this occurs users will receive an error message and their machine will automatically revert to the original operating system on the device. Common symptoms of the error code include the following:

• Error code 0xC1900101-0x20017 message box
• Inability to complete Windows 10 upgrade

Solution

Error Causes

Like many other error codes affecting Windows 10 users, 0xC1900101-0x20017 may result due to several different reasons. Oftentimes, error code 0xC1900101 -0x20017 affects users who attempt to upgrade their operating system but have incompatible drivers or hardware as well as antivirus or other security systems which prevent the upgrade from occurring. If this error message is not resolved, it could give birth to other error messages such as error code 0x80070652. 

Further Information and Manual Repair

To fix this particular error code affecting Windows 10 devices, you will need to employ at least one manual repair method mentioned within this article. Manual repair methods offer effective solutions as they seek to address the root causes related to Windows error codes. When the manual repair methods are implemented correctly, users are usually able to quickly overcome issues that cause Windows error codes and can thereafter access all the benefits Windows has to offer to its users.

Note, however, that in a few cases where technical skills are required, the need for a Windows repair technician may present itself. In such a case, resort to Windows forums and other resources to access help from a certified Windows professional. Also, consider using an automated tool where necessary.

Method One: Temporarily Disable or Uninstall Third-party Security Software

Some third-party security programs or antivirus software may interfere with the installation process when Windows users attempt to upgrade to Windows 10. To verify if this is the issue causing error code 0xC1900101-0x20017 on your device, temporarily uninstall or disable these applications. You may easily do so by checking the settings of these programs or visiting Settings within the Windows Start Menu.

Once you have disabled these programs on your device, reboot your machine and attempt to update to Windows 10. If the issue was caused by a third-party app, error code 0xC1900101-0x20017 will no longer occur and your machine will successfully upgrade to the version of Windows 10 you attempt to download.

However, in the case where error code 0xC1900101-0x20017 in Windows 10 reoccurs during the installation process, you will need to resort to another manual repair method listed below.

Method Two: Disable Firewall Software

Like method one, this manual repair method can be effective in combating issues related to 0xC1900101-0x20017. This is of course, dependent on whether or not the error code is due to an incompatible security program.

Temporarily disable your firewall by adjusting its settings. Once this step is complete, reboot your machine and attempt to install the latest version of Windows 10. If you are able to complete the process, this means the problem was due to an issue with your firewall. You can then enable the firewall you previously disabled or download another program as its replacement.

If the error code reoccurs, however, consider implementing the next manual repair method on this list.

Method Three: Use Command Prompt to Check for Damaged System Files

Command Prompt can be very effective in helping regular as well as technically skilled users repair issues with their PC. In the case of error code 0xC1900101-0x20017 in Windows 10, access Command Prompt using the following instructions.

• Step one: Right-click Start Menu
• Step two: Select Command Prompt (Admin)
• Step three: Type sfc /scannow

Be sure to enter the command as it is written above, with a space between “sfc” and “/scannow”. Wait until the scan is complete. If there are any errors related to system files, i.e. if any system files are damaged, corrupted, or missing, your machine will begin to fix it. Once the process is complete, reboot your PC then reattempt the Windows 10 upgrade process via Windows Update. If you are successful, it means that you have rectified error code 0xC1900101-0x20017. Otherwise, you may need to contact a Windows repair technician.

Method Four: Download an Automated Tool

If you wish to always have at your disposal a utility tool to fix these Windows 10 and other related issues when they do arise, download and install a powerful automated tool.

We have all experienced Windows errors over time and that can range from simple ones that will do very little to no harm and can be even system breaking making us lose our work or completely making the PC unusable. No one likes them but they happen, and usually, they happen once we least expect them.

No matter how frequent and unpleasant they might be there are ways to keep them at the minimum and even avoid them.

We will discuss steps that you can take in order to do this, simple tips and guides on how to keep your computer in top form and eliminate not just Windows, but any kind of errors altogether.

Keep your hardware clean

Believe it or not, some serious Windows errors like the dreaded blue screen of death can come from hardware issues not from the software at all. It is very important to keep your computer clean and with enough air flow so it can function properly.

Not so far ago we had an article about cleaning your hardware detailing what and how to do it. Here is a link to the article: https://errortools.com/windows/cleaning-your-pc/

Do not keep applications you are not using

Keeping applications on the drive might seem harmless but sadly that is not the case. Some applications have a certain impact on the system itself after all most of them are tweaking registry entries in Windows and sometimes having too many applications means an increased possibility of conflict over certain resources even when they are not running.

Some applications like adobe creative suite, for example, will have certain services always running in the background, and more of these kinds of applications you have, more services, more places for unexpected errors when they collide. Some of them will also install certain dependencies that could be problematic.

The general idea is: if you are not using it, uninstall it and you will be safer and more resilient to errors inside OS.

Do not use pirated or cracked software

Besides moral and law implications that using pirated or cracked software might bring you there are also certain other things that might be problematic. Certain "free" software might come packet with some problematic malware, for example, it is not uncommon for attackers to use some popular software to pack their malicious application with it.

Other things might be wrong and incomplete tweaking with application in order to bypass security and thus bringing some instability due to scripts needed to run in order to achieve this goal.

Keep your drivers updated

Errors can also come from old drivers or bad drivers, device manufacturers are not all-knowing and perfect, and sometimes drivers can wreak havoc on the system. Having updated drivers can minimize any kind of unexpected behaviors inside the operating system making it more stable and reliable.

You can check your driver version in the control panel inside the Windows OS and then compare it to the ones found on the manufacturer's site, if there are newer available it is recommended to download and install them,

Keep software updated

Applications can have bugs, and bugs can lead to certain errors both in the system and when using the app as well. It is in your best interest to get the latest patch or newer version of the software in order to avoid these unpleasant experiences.

Also, certain codecs and extensions that are installed directly in Windows can also have some unpredictable behavior, updating is the best solution to keep them in line.

Keep Windows updated

Same as with drivers and applications, Windows itself is not immune from bugs and some unpredictable issues. Luckily Microsoft is always working on fixes and features of Windows but in order to actually have benefited from that work, you will need to keep Windows updated. Sometimes a bad update can introduce some errors but you can always roll back to the previous and wait for them to fix everything and then download them all.

Check the health of your hardware regularly

Hardware components have their life cycle, more quality ones tend to last longer but eventually, they will reach the end of their lifecycle. There are a lot of testers for various components in your computer that can check different things and provide you with information about the state of your components.

If you are on Windows 11, Microsoft has included a basic health app inside OS, just type PC health check in search and start the app. For some more detailed information and advanced checks, you will have to use a custom application. There are plenty of them specialized for single components like RAM, SSD, etc. A simple google search with providing you with top results and most of them are free for personal use.

Remember, a faulty component or component that is reaching its life cycle can produce many errors inside the operating system.

Recently, a number of Windows 10 users getting an error on their computers that state, “Windows can’t find one of the files in this theme”. According to the affected users, this error occurs at random times even when they didn’t make any changes to their computer’s theme prior to getting the error. If you are one of these users, read on as this post will help you resolve this problem. If you click on the Yes button of the dialog box where the error is displayed, it won’t fix the problem as you will still get the same error from time to time. This kind of error could be caused by the executable file named “SettingSyncHost.exe”. It is possible that this executable file is unable to sync your theme all over your computer. On the other hand, it could also be due to some problems with the active theme. To resolve this issue, you can try to change the active theme, or disable the custom screensaver or disable theme syncing on your computer, as well as run a System File Checker or run the DISM tool. For more instructions, follow the options given below.

Option 1 – Try to change the active theme

The first thing you can do to fix the error is to change the active theme of your computer since the SettingSyncHost.exe file might not be able to properly sync the theme on the computer.

• Go to Settings and click on Personalization.
• Next, click on Themes and scroll down to apply a theme, and change the theme of the operating system.
• After that, tap the Win + R keys to open the Run dialog box and type “%windir%ResourcesThemes” in the field, and then tap Enter to open the folder where the theme files are located.
• Once you’re done, right-click and select delete for the active theme to remove the theme and its resources. This should fix the root cause of the problem. If not you can try to create a new Windows 10 theme and save it.

Option 2 – Try to disable the custom screensaver

The custom screensaver is a part of the mechanism of the lock screen. Although they were needed in the earlier Windows versions to prevent the discoloration of CRT monitor screens, they are no longer needed in the current version of Windows. Thus, you can try to disable it as it could be the one that’s causing the problem.

• Click on the Start button and go to Settings > Personalization > Lock screen.
• Here, scroll down and click on the Screen Saver settings.
• After that, select the “Screen saver to (None)” option from the drop-down menu. This will disable the custom screensaver.

Option 3 – Try to disable theme syncing on your computer

You could also try to disable the theme sync feature to fix the problem. This has worked out for some users. To do so, follow these steps:

• Click on the Start button and go to Settings > Account > Sync your settings.
• From there, toggle off Themes in the individual sync settings column. This will disable the Theme syncing.
• Restart your computer and see if the problem is now fixed.

Option 4 – Run the DISM tool

The next thing you can do is run the DISM tool. This tool is known to repair potentially corrupted files in your system as having them could also system issues like the “Windows can’t find one of the files in this theme” error. To repair these corrupted system files, you can run the DISM commands:

• Tap the Win + X keys and click on the “Command Prompt (Admin)” option.
• After that, input each one of the commands listed below sequentially to execute them:
  • Dism /Online /Cleanup-Image /CheckHealth
  • Dism /Online /Cleanup-Image /ScanHealth
  • Dism /Online /Cleanup-Image /RestoreHealth

• Once you’ve executed the commands given above, restart your computer and check if the problem is now fixed.

Option 5 – Run the System File Checker

System File Checker or SFC is a built-in command utility that helps in restoring corrupted files as well as missing files. It replaces bad and corrupted system files to good system files that might be the cause why you’re getting the “Windows can’t find one of the files in this theme” error. To run the SFC command, follow the steps given below.

• Type “cmd” in the Start search and then right-click on the appropriate search result.
• Next, select “Run as administrator” to open Command Prompt with admin privileges.
• After opening Command Prompt, type in sfc /scannow

The command will start a system scan which will take a few whiles before it finishes. Once it’s done, you could get the following results:

1. Windows Resource Protection did not find any integrity violations.
2. Windows Resource Protection found corrupt files and successfully repaired them.
3. Windows Resource Protection found corrupt files but was unable to fix some of them.

• Now restart your computer and see if the problem is fixed or not.

There are not many applications for creating mind maps, even fewer that are completely free, so it is with great pleasure to present you with Freeplane. Freeplane is mind mapping, Knowledge Management, and Project Management software completely free and open source. You can it here: https://sourceforge.net/projects/freeplane/files/latest/download

And from developers git page and I quote:

Freeplane is a free and open-source software application that supports thinking, sharing information, and getting things done at work, in school, and at home. The core of the software is tools for mind mapping (also known as concept mapping or information mapping) and using mapped information. Freeplane is written in Java using OSGi and Java Swing. It runs on any operating system that has a current version of Java installed. It can be run locally or portably from removable storage like a USB drive. We use Github only as of the main code repository, all other project parts are hosted at the source forge. So all bugs and feature requests are managed in a separate issue tracker. There is a drop-down box for selecting different types of issues. Other sources of inspiration are our new forum and old forum. Some users write their ideas there. Every contributor and every team member freely decides what task he is going to work on, but for making the best decision we can communicate our self-set goals in the above forum. It is supposed to enable early discussions and community feedback and also to motivate you and other people.

How to start hacking and contributing

People new to the project can start with implementing a new small feature or doing some refactoring or documentation and not with the bug fixing. Not all bug reports seem to be equally important, and if there are important bugs they usually get fixed by people who broke the functionality. I think you should first get there :). For internal developer discussions, there is a private mailing list. It is held private to avoid spam mails. If you want to be subscribed let us know what mail address you are going to use with it. This list is the preferred way to ask all code-related questions because they usually get answered soon and by the most competent team member. Some documentation for new developers is available in Freeplane wiki https://www.freeplane.org/wiki/index.php/How_to_build_Freeplane and also here and here. It is written for new guys and should also be maintained by the new guys to stay up to date. Looking forward to any questions and contributions, Freeplane development team

Where all have been there, we are downloading something and for any kind of reason chrome closes, internet breaks, etc. And our download is interrupted and gone forever, and we need to start again. You will be glad to hear that chrome has side a download manager which tracks each download you made and you can use this manager to resume interrupted downloads. Please note that some websites have certain scripts that will prevent you to resume interrupted downloads, in this case, using chrome's download manager will not work and you will have to start the download again. All of this being said, if your download has been interrupted, and went away, pin Chrome press CTRL + J to open download manager, find your interrupted download, and press the resume button. That's it, you have successfully resumed your download.

Windows Update Error 0x80071a91, what it is? As you know, Windows Updates are very essential to the operating system since they push with them the important security updates that are crucial to the system. And if a Windows Update is delayed, it can the system vulnerable to potential threats. Thus, this kind of issue must be resolved right away. One of the errors that you can encounter while updating your computer is the Windows Update Error 0x80071a91. The error code 0x80071a91 occurs when the “Transaction support within the specified file system resource manager is not started or was shut down due to an error”. This happens when a service called “File System Resource Manager” or FSRM does not function due to some reason. To fix the Windows Update Error 0x80071a91, here are some suggestions that could help.

Option 1 – Run the Windows Update Troubleshooter

Running the built-in Windows Update troubleshooter could also help you resolve the Windows Update Error 0x80071a91. 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 2 – Disable the antivirus program temporarily

There are times when the antivirus program installed in your computer blocks file access and even disk access. Thus, disabling the antivirus program or any security software installed in your computer is always a good idea you can try when the Windows Update process does not go smoothly. So before you try updating your computer again, make sure to disable the antivirus or security program and once the Windows Update is done, don’t forget to enable the antivirus program back again.

Option 3 – Try resetting the File System Resource Manager

As pointed out earlier, the error 0x80071a91 pops up when the FSRM service suddenly stops working and so resetting this service via Command Prompt might resolve the problem. To do so, follow the steps below.

• In the Windows Search box, type “command prompt” and hit Enter.
• Then right-click on Command Prompt from the related search results and click the “Run as administrator” option.
• After opening Command Prompt as admin, type the following command and hit Enter:

resource setautoreset true C:

• After that, exit Command Prompt and restart your computer and then check if the problem’s fixed by running Windows Update again.

Option 4 – Flush the contents of the SoftwareDistribution folder

You have to stop a couple of services such as BITS, Cryptographic, MSI Installer, and Windows Update Services. And to do that, you need to flush the contents in the SoftwareDistribution folder. The Software Distribution folder in the Windows operating system is a folder that can be found in the Windows directory and is used to store files temporarily which might be required to install the Windows Update on your PC. Thus, it is required by the Windows Update and maintained by WUAgent. Aside from that, it also contains all the Windows Update History files and once you delete them, you will most likely lose the Update history. As a result, the next time you run the Windows Update, it may result in a longer detection time.

• Open the WinX Menu.
• From there, open Command Prompt as admin.
• Then type in the following command – don’t forget to hit Enter right after typing each one of them.

net stop wuauserv net start cryptSvc net start bits net start msiserver

• After entering these commands, it will stop the Windows Update Service, Background Intelligent Transfer Service (BITS), Cryptographic, and the MSI Installer
• Next, go to the C:/Windows/SoftwareDistribution folder and get rid of all the folders and files thereby tapping the Ctrl + A keys to select them all and then click on Delete. Note that if the files are in use, you won’t be able to delete them.
• Once all the contents in the Software Distribution folder are deleted, restart your PC and then go back to Command Prompt and input the following commands again.

net start wuauserv net start bits

Option 5 – Delete the Common Log File System transaction logs

You might also want to delete the Common Log File System or CLFS transaction logs to fix the Windows Update Error 0x80071a91.

• Open an elevated Command Prompt.
• Then type each of the commands listed below and press Enter after you type each one of them.
  • cd /d %SystemRoot%System32SMIStoreMachine
  • attrib -s -h *
  • del *.blf
  • del *.regtrans-ms
• After you’ve executed the commands given above, restart your computer and try to update Windows 10 again.

Internal Error 2503 - What is it?

Internal Error 2503 mostly pops up on Windows 8. It occurs when you try to uninstall or install software on Windows 8. The error code message may vary and displayed in different formats such as:

The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2503. Called RunScript when not marked in progress The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2503. Called Install Finalize when no installation is in progress

Solution

Error Causes

Some of the most common causes for internal error 2503 are:

• Permission not granted to access the Windows Installer Folder
• Viruses
• Problems with Windows Installer

Further Information and Manual Repair

To repair this issue on your PC without any professional assistance, try the DIY methods given below:

Method 1

Internal error 2503 may occur when your account has limited privileges. You don’t have the privilege to use or access the Windows Installer folder. Your inability to access this folder hampers you from successfully install or uninstall the desired program on your PC. To gain access, you need to ensure you have permission.

• For this navigate to the C:\windows folder. Here find the installer folder and then right-click and choose properties.
• After that click on the security tab and check if the System and Administrator account has Full access permission.
• For that make sure the system group option has ‘all’ selected to allow you full permission.

Method 2 - Re-register Windows Installer

Another alternative to resolve internal error 2503 is to re-register Windows Installer.

• To do this, go to Start and click Run. Now type ‘msiexec /unreg’ in the Run box and then press enter.
• Follow the same steps and now type ‘msiexec /regserver’ in the box and then press enter. This will resolve the issue.

Method 3 - Remove Viruses

If internal error 2503 is triggered by a viral infection on your PC, then it is advisable to download an antivirus and scan your entire system. Viruses are notorious for system failures and pose data security threats. If not removed timely, these malicious programs can damage your PC. To remove all viruses on your system, run an antivirus. An antivirus detects all malicious software programs including viruses, malware, adware, and spyware. Delete all the malicious files found right away. This will help resolve internal error 2503.

What is Error Code 0x80070715?

Seeing obscure error codes like 0x80070715 on the screen again and again can be annoying simply because you have no idea why it keeps popping up? What does it mean? Well, for beginners you don’t have to decode it, we’ll make it simple for you. This error code indicates missing .dll files in the system or a corrupt registry. Due to this, you get locked from accessing and running applications on your system.

Solution

Error Causes

This error occurs largely because of two reasons:

1. Disk damage due to cluttered registry
2. The system gets infected by malware or a virus(es)

The error code 0x80070715 creates hurdles in the functioning of the applications. If this error is not repaired immediately it can result in serious damages like system crash and failure.

Further Information and Manual Repair

Many people pay hundreds of dollars to technicians to resolve this issue on their systems. Is it worth it? Not exactly!

How about we tell you a time and a money-saving way to fix the error code 0x80070715 on your PC?

The best way to resolve this issue on your system in seconds and also for free is to install Restoro. This is an advanced, powerful, and multi-functional system repair and a PC optimizer tool. It is smoothly integrated with numerous performance-driven utilities like registry cleaner, privacy error detector (anti-virus), Active X and Class error, and system stability detector. With this helper, you can resolve not only the error code 0x80070715 but also other types of PC-related errors. Whether the cause of the error code 0x80070715 on your PC is malware or cluttering cluttered disk, Restoro can be used to resolve them all. Its powerful and intuitive registry cleaner scans the registry and repairs it successfully. It removes junk files, internet history, temporary internet files, invalid entries, and also the files from the uninstalled programs still saved in the system’s registry. It wipes out all the clutter on your hard disk and cleans it in seconds freeing up plenty of space. It repairs the registry resolving the error 0x80070715 quickly. Nonetheless, if the error 0x80070715 is triggered due to viral infection or malware it removes them too. By downloading unknown files, accessing malicious websites, and opening phishing emails viruses can enter your PC. You may not be aware of these until error code 0x80070715 pops on your screen. It is wise to remove viruses right away because these give hackers access to your system which often results in data breaches and exposes users to system security threats. Restoro also works as a powerful antivirus. All malware, spyware, and viruses affecting your PC are scanned with the help of the advanced built-in privacy error detector utility. This utility embedded in the system detects viruses and malware in your system and removes them from your system successfully. Restoro is an easy-to-use repair tool. It has a simple layout and a user-friendly interface. It is easy to navigate through the repair tool, scan for errors and repair them without any hassle. Users of all levels, novice and experienced can use this tool with ease. You don’t need to be technically sound to work around this tool. Here's how to Install and run Restoro PC Fixer: In addition to this, you can run it on any Windows version. It is compatible with practically all versions. No matter what the cause for error code 0x80070715 maybe, you don’t need to get into the nitty-gritty of it and find a specific tool to resolve the issue. All you have to do is install this multi-functional Restoro on your system. Here are the 3 simple steps that you need to follow for successful repair:

1. Click here to install Restoro.
2. Scan your PC
3. Press the Repair Tab to fix the issue right away

To ensure your PC is error-free, registry clean and your system runs at its optimum speed, scan your PC with Restoro regularly.

If you encounter an error message saying, “The ordinal xxx could not be located in the dynamic link library C:/Program Files (x86)/Microsoft VS Code Insiderscode – insiders.exe“ and you see a reference of a missing DLL file, then this indicates that the software is trying to locate the related DLL file, however, it is missing, hence the error. The error mentioned “Ordinal” which refers to the order of a number mathematically, e.g. 1st, 2nd, etc. And in this error message, the ordinal is referring to an Xth file of an XX.DLL file which is missing which is why you’re getting this kind of error. When you get this particular error, it means that your computer is missing the Microsoft Visual C++ Redistributable program. As per the error message, XXX is a number that in turn is the Ordinal. There is also another common error related to Ordinal which says, “The ordinal 12404 could not be located in the dynamic link library mfc90u.dl”. The error message could be referring to any DLL in the message. And since all these DLL files are part of the package, the error changes quite a bit as the Visual Studio looks for that DLL file. To fix this error, here are some suggestions that might be of help.

Option 1 – Try installing Microsoft Visual C++ Redistributable

As pointed out earlier, the error pops up when the Microsoft Visual C++ Redistributable program is missing on your computer. Thus, you need to download it from the official website of Microsoft. Once you’ve downloaded the Microsoft Visual C++ Feature Pack Redistributable Package, install it and then check if the error is now fixed.

Option 2 – Try to install OpenSSL

If you encounter the same error message but it points out that the LIBEAY32.DLL file is missing, then you have to install OpenSSL. In such a case, you will see the following error message:

“Ordinal not found. The Ordinal [Xxxx] could not be located in the Dynamic Link Library Libeay32.dll.”

 Make sure that when you install OpenSSL, you do it into the Windows system directory since the Libeay32.dll file is related to security.

Option 3 – Try to check Windows Updates

There are instances when Microsoft rolls out the framework and related updates via Windows Updates. It could be that an update related to DLL is still pending which is why you need to check Windows Updates. To do so, go to Settings > Update and Security and from there check if there is any pending update. If there is, you need to install that update and then restart your computer if needed.

Thorconnwndclass error is an Outlook error that has recently reared its head. Known to create several problems in the proper functioning of the Outlook application, this error is essentially a constituent of the Norton Antivirus Crash Guard Symantec component. That’s why those using the Norton Antivirus program are most likely to encounter this error.

Solution

Error Causes

When the Thorconnwndclass error occurs, the Outlook closes unexpectedly, users encounter problems while sending or receiving emails and, performance of Outlook is degraded and this happens because issues arise while accessing the PST file. Because of this damaged PST file, stored data is unavailable for access. Other factors that trigger the Thorconnwndclass error are listed below.

• Corrupt or damaged Outlook Add-ins
• Corrupt or damaged Outlook bar
• Unfinished Outlook installation
• Faulty settings
• Thorconnwndclass Norton is being used with Outlook

Regardless of the underlying factors that lead up to the occurrence of this error, it's of paramount importance that workarounds are implemented to ensure desired performance of Outlook in the long run.

Further Information and Manual Repair

While there are several ways to rectify this error, some of the most common ones are listed below as follows.

• The most effective solution is the PST file repair tools available online. These tools use a complex algorithm and thoroughly scan the PST file and repair it as needed. This resolves the Thorconnwndclass error that one encounters in Outlook. Usually such software have an easy to use interface and can easily be used, without the need for the user to have a strong technical background. Another advantage of using these software available online is that they not only repair the file, but they often play a pivotal role in retrieving inaccessible or lost data.

Some other tips for manually resolving this problem are listed below as follows.

• First and foremost, disable your Norton Antivirus program if it’s installed on your system. Now, open the Outlook application in Safe Mode. Since this problem may also be triggered by damaged or corrupt Outlook add-ins, it is strongly advised that you disable or uninstall them. Now, you will come across some .dat files. Rename them by changing the existing .dat files to new .dat.
• Another useful approach is to employ the Inbox Repair tool offered by Outlook.
• Finally, one can also use the scanpst.exe file to fix any problem or error that resides within the  Outlook application.