Fix “Diskpart failed to clear disk attributes”

What is this particular error?

One common issue when trying to upgrade to Windows 10 from Windows 7 or 8 is incompatible software. Any installed software or app that isn’t compatible with Windows 10 will prevent you from continuing with the set-up. Normally, you’ll get an error message “What needs your attention” and it will ask you to uninstall a list of apps manually. Unfortunately, some users reported that they couldn’t find the app it asks to uninstall. In some cases, users said they’ve already uninstalled the app but it still won’t start the Windows 10 Setup.

Solution

Error Causes

This type of issue normally occurs because of the following:

• Incompatible software/apps
• Corrupted software/apps
• Incomplete uninstallation

Further Information and Manual Repair

Here are some steps you can take whenever you encounter this error.

Note: Before taking any steps, make sure that you’re highly equipped to do so. Some steps might affect the system and even do more damage to your computer. You might also want to consider using an automated tool instead.

Method 1 – Perform a clean boot, then retry upgrading

A clean boot is normally done to start Windows using the least set of drivers and startup programs available. By doing this, it eliminates possible software issues that happen when installing or uninstalling a program in Windows 10.

Before performing a clean boot, make sure to take note of the following:

• You need administrative privileges in order to perform this action.
• When doing this, your computer might lose temporarily functionality. However, it will return after start-up.
• It is highly advisable to not use the System Configuration to change advanced boot options.

Here are the steps to perform a clean boot.

• Step 1 – Go to Start and search for msconfig
• Step 2 – Go to System Configuration
• Step 3 – Under Services tab, click on the “Hide all Microsoft services” checkbox. Then, choose to Disable all
• Step 4 – Go to the System Configuration’s Startup tab. Then, click on “Open Task Manager”
• Step 5 – In the Task Manager dialog box, you will see a Startup tab. Choose items that you want to disable and then click the Disable button
• Step 6 – Close the Task Manager dialog box.
• Step 7 – Go back to the Startup tab of the System Configuration box. Click “Ok” then proceed with restarting.

Method 2 – Manually uninstall programs from the Program Files folders

Instead of using the “add or remove programs” feature in Windows, you might need to manually install the program directly from the C drive. To do this, follow the steps below:

• Step 1 – Go to the C drive, and look for the Program Files folders. For 32-bit users, you can find it at C:\Program Files. If you’re using the 64-bit version of Windows, go to C:\Program Files (x86) folder.
• Step 2 – Find the “uninstall” application file
• Step 3 – Right-click, and run the file as administrator. Wait for the uninstallation to finish. In some software, you need to restart your system before the uninstallation will take effect.

Note: In some cases, you may also need to search for files related to the program. You can use the search bar under Drive C to do this. Delete those files as well.

Method 3 – Create a new user account

Before upgrading to Windows 10, create a new user account. Make sure it has administrative privileges. From there, run the upgrade.

Method 4 – Use third-party uninstaller services

If you still can’t run Windows 10 Setup after the above methods, you might need to rely on a third-party service. Microsoft recommends Revouninstaller that can help you.

Before using this software, reinstall the application or utility that Windows 10 wants you to install. Then, use Revouninstaller to delete the program completely.

Method 5 – Disable third-party antivirus software

Some users who experienced this issue reported that it was solved after disabling or completely uninstalling the anti-virus software installed in their system.

Method 6 – Use a trusted automated tool

If after trying the above methods, the problem still persists, it might be best to use a trusted automated tool to fix the issue.

What is Search.schooldozer.com? And how does it function?

Search.schooldozer.com is a browser extension that functions as a search engine. It is developed and maintained by “Schooldozer”. It claims to improve users’ browsing experience by providing them with improved search results. However, it does not really do the things it claims to do. In fact, they’re quite the opposite ones – instead of improving the browsing experience, it makes users’ browsing experience unsafe and full of sponsored content. This is in contrast to what it states in its Privacy Policy:

“Install applications the easy way and without the hassle, using the Schooldozer downloader. The Schooldozer platform stems from years of experience with installing applications, resulting in a highly optimized process, yielding faster downloads, better user experience, and more successful installations.”

In addition, once installed Search.schooldozer.com is installed, it will change the default settings of a browser such as the default search engine, homepage, and new tab page. This is why security experts regard this browser extension as a browser hijacker and a potentially unwanted program. The modification of the browser's settings allows it to control users’ browsing by redirecting them to sponsored sites as well as deliver sponsored content from its affiliated sites in order to gain profit via pay-per-click marketing. And if you think that the ads it displays are harmless, think again for some of these ads can redirect you to suspicious websites that might contain harmful content. What’s more is that this browser hijacker can also keep track and monitor all your browsing activities in order to obtain your browsing data like search queries, what sites you always visit, browsing history, browser type, OS version, and so on. The information collected is then used and may even be shared with its affiliated third parties to deliver more customized and personalized advertisements.

How is Search.schooldozer.com distributed over the web?

Like a typical browser hijacker, Search.schooldozer.com is distributed using the software bundling method where several unknown and unwanted programs are bundled in a software package. Thus when you install any software bundle, make sure to always opt for the Custom or Advanced installation setup rather than the quick setup to avoid installing unwanted programs like Search.schooldozer.com. To remove Search.schooldozer.com from your computer, follow the removal guide below carefully. Step 1: Start the removal process by closing all the browsers infected with Search.schooldozer.com. If you’re having a hard time closing them, you can close them using the Task Manager just tap on Ctrl + Shift + Esc. Step 2: After you open the Task Manager, go to the Processes tab and look for the infected browser’s process and end it. Step 3: Then close the Task Manager and tap the Win + R keys to open Run and then type in appwiz.cpl to open Programs & Features in Control Panel. Step 4: From there, look for Search.schooldozer.com or any unfamiliar program that could be related to it under the list of installed programs and once you’ve found it, uninstall it. Step 5: Edit your Hosts File.

• Tap the Win + R keys to open then type in %WinDir% and then click OK.
• Go to System32/drivers/etc.
• Open the host file using Notepad.
• Delete all the entries that contain Search.schooldozer.com.
• After that, save the changes you’ve made and close the file.

Step 6: Reset all your browsers to default to their default state.

Google Chrome

1. Launch Google Chrome, press Alt + F, move to More tools, and click Extensions.
2. Look for Search.schooldozer.com or any other unwanted add-ons, click the Recycle Bin button, and choose Remove.
3. Restart Google Chrome, then tap Alt + F, and select Settings.
4. Navigate to the On Startup section at the bottom.
5. Select “Open a specific page or set of pages”.
6. Click the More actions button next to the hijacker and click Remove.

Mozilla Firefox

1. Open the browser and tap Ctrl + Shift + A to access the Add-ons Manager.
2. In the Extensions, menu Remove the unwanted extension.
3. Restart the browser and tap keys Alt + T.
4. Select Options and then move to the General menu.
5. Overwrite the URL in the Home Page section and then restart the browser.

Internet Explorer

1. Launch Internet Explorer.
2. Tap Alt + T and select Internet options.
3. Click the General tab and then overwrite the URL under the homepage section.
4. Click OK to save the changes.

Step 7: Hold down Windows + E keys simultaneously to open File Explorer. Step 8: Navigate to the following directories and look for suspicious files associated to the browser hijacker such as the software bundle it came with and delete it/them.

• %USERPROFILE%Downloads
• %USERPROFILE%Desktop
• %TEMP%

Step 9: Close the File Explorer. Step 10: Empty the contents of Recycle Bin.

Windows 11 is coming soon, from its typical view and color scheme, Windows 11 will natively support dark mode. The dark mode is very popular in many applications today, some large companies like Adobe, Autodesk, and many more have already adopted a dark color scheme for their software so it is logical for others to follow and Microsoft is aboard for it. The dark mode itself has its benefits, for people who work on computer for longer period of time dark mode inside applications will throw less white and blue light on their eyes making workhours easier and pleasant on them. As a person who does indeed spend a lot of time in front of the screen, I would advise you to switch to dark mode regardless of the time that you spend with a computer, your eyes will be grateful.

Switching to Dark mode in Windows 11

1. Open Windows 11 Settings by pressing ⊞ WINDOWS + I
2. Click on Personalization on the left sidebar
3. On the right side click on Color
4. In color options click on the drop-down menu right next to Choose your color
5. Select Dark

Your choice will be applied right away and you can safely close settings.

RSAT or Remote Server Administration Tools for Windows 10 is a collection of programs for IT experts. It helps in managing Servers from a Windows 10 PC and starting with the Windows 10 v1809 or the October 2018 update, users have to install the Remote Server Administration Tools for Windows 10 as Features on Demand or as Optional Features. The program includes the Microsoft Management Console or MMC snap-ins, Server Manager, consoles, Windows PowerShell cmdlets, and providers as well as command-line tools for managing roles and features that run on the Windows Server. So if you have updated your Windows 10 pc to v1809 or later then the RSAT tool has to be installed as a set of Features on Demand right from Windows 10. You can install RSAT Tools on Windows 10 Enterprise or Windows 10 Professional and once you install it, make sure that you do not install RSAT tools from the Microsoft Download page directly. Step 1: Open Settings and then go to Apps > Apps & Features. Step 2: Next, click on Manage Optional Features. Step 3: After that, click on Add a Feature which will load all the optional features one can install. Step 4: Now scroll to find the listing of all 18 RSAT tools and depending on what you need, click and install them. Step 5: Then go back to where you should see the progress of the installation. Click on the Manage Optional Features page to check the status. Note: If you are well-versed with the command line or automation, you can also install Remote Server Administration Tools for Windows 10 via DISM /add-capability. And when you install anything via Features on Demand, they stay across Windows 10 version upgrades. On the other hand, if you feel that you don’t need a particular RSAT feature, you have the option to uninstall it using the Manage Option Features. However, bear in mind that some tools depend on one another which means that if you uninstall anything that has a dependency, it will only fail that’s why you need to be careful.

To uninstall an RSAT feature, here’s what you have to do:

Step 1: Go to Settings > Apps > Manage Optional Features. Step 2: After that, look for the list of installed feature that appears before this. Step 3: Now select the feature you want to uninstall and go back. If you have some system-related issues that need to get fixed, there is a one-click solution known as [product-name] you could check out to resolve them. This program is a useful and efficient tool that could repair corrupted registries and optimize your PC’s overall performance. Aside from that, it also cleans out your computer for any junk or corrupted files that help you eliminate any unwanted files from your system. This is basically a solution that’s within your grasp with just a click. It’s easy to use as it is user-friendly. For the complete set of instructions in downloading and using it, refer to the steps below.

Error Code 0x80072F8F - What is it?

Error Code 0x80072F8F manifests in one main way. It is known to appear as early as Windows 7, and mainly deals with an error that occurs in the update process, or when the computer is trying to connect to the online activation service. It can appear when the activation fails to verify the product key. The error code will present itself when the system realizes that the PC's date and time are incorrect. Error Code 0x80072F8F will also appear if the computer has determined that the time zone settings on the computer are not accurate.

When Windows is going through the installation process and is verifying all of the information associated with the computer, Error Code 0x80072F8F will arise, indicating that the information in the computer's settings is not valid. Correct times and dates are necessary when using serial validation keys to install Windows. When these settings are outside of the tolerated window, the problem will arise.

Error Causes

There is only one main symptom to look out for, and it will manifest during a Windows installation. In the midst of the installation, the computer will not be able to proceed with the installation if Error Code 0x80072F8F has popped up. Because the information cannot be verified, Windows will not be able to continue the installation process when the time settings are not accurate. This interrupts the process, causing the need to edit the settings, restart the computer, and try again. It is imperative to be sure that the date and time on the computer are inside of the tolerated window for the serial key.

• This error code will not give any information on how to correct it.
• Windows Error 0x80072F8F is displayed on the screen.
• The error code appears when typing the Windows serial key and proceeding.

Further Information and Manual Repair

When experiencing Error Code 0x80072F8F, the date and time need to be corrected in the computer settings menu, and then verify the correct time zone settings.  There are a few different ways to edit the time and date settings, and one may need to even edit the time zone settings. After this, restarting the computer may be needed. When booting into Windows, the validation code should be activated within 30 days of obtaining the serial number.

• Method One

Check the time and date settings.

1. Open the Start menu.
2. Select Settings, then Time and Language, then Date and Time.
3. Check and make sure that the PC is operating at the correct time and date.

• Method Two

Ensure that the computer is connected to the internet.

1. Enter “network troubleshooter” into the search box located on the taskbar.
2. Select “Identify and Repair Network Problems”.
3. Follow the instructions that are given on-screen. This will fix any problems that the network is experiencing.

• Method Three

Review the timezone.

1. Open the Start menu.
2. Select Settings, then Time and Language, then Date and Time.
3. Check to make sure that the correct timezone is selected from the drop-down menu.

• Method Four

Reboot the PC and check if that fixes the problem. This may help in the event that the network troubleshooter does not detect a problem.

After completing these steps to edit the time, date, and time zone settings, it may be necessary to restart the computer. This is to ensure that the computer will save and recognize the new settings. After restarting, continue the process as intended and enter the product key. The computer will now be able to verify the product key since the time and date will be recognizable. The Windows installation should proceed as normal and complete successfully when the time, date, and time zone are inside of the parameters for the Windows product key.

In short, if it is not, the computer will not be able to recognize the product key, thus will not be able to install the Windows product. Generally, the fix is quite simple and does not take much time at all, but it is very important.

Anytime when a new folder is created in Windows name "New Folder" is offered and set as the default name. If by any chance you would like to change this and set your own default name instead of the standard one, follow this guide. Please be aware that this guide will require you to change the registry of Windows, it is common practice to make a backup of your registry each time you want to manually change any values in it, just in case something goes wrong.

• In order to change the default new folder name first press ⊞ WINDOWS + R to open the run dialog, type in it RegEdit, and press ENTER
• In registry editor find the key:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer

• Select the NamingTemplates key. If it is not present, you’ll need to create one.
• Right-click the NamingTemplates key to add a String Value.
• Assign it the following name: RenameNameTemplate.
• Double-click on the RenameNameTemplate data value to open the Edit String dialog box.
• In the Value Data field enter the new text you want to appear when you create a new folder. You have to make sure you are not using any of the following characters: \ / ? : * " > < |
• Close the Registry Editor and Exit.
• Now, when you create a new folder, it will be named Whatever you chose instead of the New folder.

And that is all to it, you now have your own personal new folder naming template.

Files.exe Error - What is it?

To understand what Files.exe Error code is, it is first important for you to know what EXE stands for, and EXE files function. EXE is the abbreviation for Executable. It is a file extension for an executable file format. This file contains a program that is a particular file type capable of being executed or run as a program. The Windows Operating System contains literally thousands of executable files. Every program that you have installed on your PC runs because the .exe application files execute the tasks. Files.exe are also used by websites that are not entirely static to display properly. There are thousands and thousands of exe files on your PC that are supported by millions of Dynamic Link Library (DLL) files. It is advisable to run executable files from publishers you trust because these files can potentially change your computer settings and harm your PC. The files Exe error code occurs when you are unable to open and run executable files. The error message is often displayed in either of the following formats:

• ‘Access Deny’, ‘Runtime error ‘
• Windows cannot find FileName.exe
• Windows cannot find FileName.exe. This program is needed for opening files of type "ProgramName".
• Windows cannot find ProgramName. Make sure you typed the name correctly

Solution

Error Causes

The files Exe error code can be triggered due to multiple causes:

• Corrupt registry
• Viral infection- This changes the default configuration for running exe files
• Missing files
• Invalid registry entries

If this error occurs on your PC, it is advisable to fix it immediately to ensure your desired programs run smoothly. Also, if not fixed timely it can lead to serious PC damages like system failure, registry corruption and also put you at risk of privacy errors if the cause of this error is viral infection and spyware.

Further Information and Manual Repair

To resolve the files.exe error on your PC, try the solutions given below:

Clean and Restore the Registry Manually

If the files.exe error occurs on your system due to registry corruption, then to resolve it you need to clean it and restore it back. You can do this manually and automatically. The manual way is slightly time-consuming and tricky. If you are not a computer programmer and don’t have sound technical expertise, then you may find the manual procedure of cleaning the registry complex. However, we’ll be discussing both methods one by one. The registry is the main database of the PC. It saves all the files on your system including both important and unnecessary files and obsolete files like bad keys, invalid registry entries, temporary files, cookies, internet history, and junk files. It is important to delete these files from the registry because they take up a lot of disk space and also damage and corrupt the registry. And when this happens, you start experiencing file.exe errors. To clean and repair the registry manually, here’s what you should do:- First, go to the start menu and then click run.

• Now type ‘command.com’ and press enter.
• After this, type the following commands: “cd” press enter then “cd windows” press enter.
• Type copy ‘regedit.exe regedit.com” and press enter again.
• After that type ‘start regedit.com” and press enter. Now navigate to and select the key: HKEY_CLASSES_ROOTexefileshellopencommand.
• Once you select the key, in the right pane double click the default value.
• Delete the current value data and simply insert “%1”%*.
• Close the Regedit (registry editor) utility. Now try running your desired program; it is most likely to resolve the error if it occurred due to registry corruption.

Clean & Restore Registry Automatically with Restoro

To clean and restore the registry automatically in seconds, run a deep Registry system scan using Restoro. This is a powerful registry cleaner deployed with intuitive algorithms that scan for all types of registry issues on the system. It wipes out all the unnecessary files in seconds, clearing up the cluttered disk, and also simultaneously repairs and restores the registry. In just a few simple clicks the error is resolved.

Run an Antivirus

If the files.exe error code is triggered by viral infection and spyware, then to resolve it install and run an antivirus. However, once you install an antivirus, your PC speed may slow down dramatically. This is often compromise users have to make to keep viral infection and malware away from their systems. But you don’t have to make this compromise if you download Restoro. This tool is more than just a powerful registry cleaner. It is embedded with multiple utilities that help remove practically all types of PC-related issues. These utilities include antivirus and a system optimizer. The antivirus utility scans and removes all malicious software on your system and while the system optimizer module boosts your system’s speed. Total System Care is safe, multi-functional, and efficient software. It is compatible with all Windows versions. To resolve files.exe error on your PC, click here to download Restoro NOW!

The error 0x0000001 also known as APC_INDEX_MISMATCH is one of the fatal errors that users encounter upon starting their computers. This error appears when there is a sequence mismatch in the driver or system file when it is disabling or re-enabling Asynchronous procedure calls. The mismatch happens maybe because of a virus or malware attack, not shutting down your computer properly and incomplete installation of the system files. There are many ways to fix this error. The easiest way is to download a repair utility program. The use of these programs perfectly fits those that are not so technical. All you have to do is download the program and install it on your computer. As soon as it is installed, the program will now scan and diagnose your computer for any errors. After it identifies the errors, it will then repair your PC through either manual or automatic tools. To those who are techie and enjoy the manual resolution, you may take advantage of Microsoft’s analyze debug extension which tells you the cause of the error. After determining the cause then you can now start fixing the error. Check if Hardware is functioning properly. If the cause is due to a hardware malfunction, you will have to make sure that all the pieces you are using are working. All the wires should be attached to their respective ports. Not only that, but you also must make sure that before installing the hardware, it is compatible with the Windows version that is installed into your computer. Use Compatible software. If the problem was caused by software or a driver, you can uninstall and reinstall it. Always make it a rule that whenever you install a program or new software to your computer, make sure it is compatible with your operating system and never skip a step during the installation process. You also have to see to it that the program you are installing does not contain any viruses, malware, or spyware that can be harmful to your computer. Update your Drivers Regularly. In most cases though, the cause of the APC_INDEX_MISMATCH error are outdated device drivers. To resolve this, you will have to go to your Control Panel then look for Device Manager. As soon as you are in the Device Manager window, you can now see the different devices running on your computer. You right-click on each device and check the Properties.  In the Properties window, click on the Driver Tab and look for the date when it was last updated. You can then go to the manufacturer’s website and compare the dates. For a new Windows operating system, you no longer have to go to the manufacturer's website though. All you have to do is click on Update Driver and it will automatically search for updates online. Use a Genuine Operating System. There are also cases where the 0x0000001 error won’t allow you to access your computer. In this case, we have to suspect that the problem could be in your Operating system. To resolve this, you can reinstall your Operating System or update your current operating system. Only use a genuine licensed Windows Operating System because this will not only protect you from Malware and Viruses but it allows you to get all the recent update available from Microsoft. Update your Windows 10 regularly by going to Settings > Windows Update > Check for Updates. You may also turn on the Automatic Update by going to the Advanced options is found on the Windows Update Page. You can always get help online but it really helps to know the basics and determining the root cause of the error.

If you are trying to save a file in a PDF format on your Windows 10 computer but then the PDF text content in an Adobe file suddenly disappears, then read on. This post will give you more insight into this issue. This kind of issue is rare and mostly occurs in forms that you can fill upon. In such a case, the text you enter in the form vanishes right after you click the Save button. One of the benefits of working with PDF files is that it has the ability to compress high-quality files to relatively small file sizes. This is really useful especially when you are saving hard drive space and you’re working with limited storage resources. However, these files can contain layered content if they are created from layered documents using applications like Adobe InDesign. Consequently, a single page of the PDF file can contain different layers with different content. So if you try to save or print a PDF file that contains layered content, the elements will disappear from the PDF. To resolve this issue, you can try to merge or flatten the file since it will help keep the changes in the PDF file. On the other hand, you can no longer make any alterations or form data once you flatten the file. Another thing to keep in mind is that merging or flattening the file can’t be undone so you might want to save another copy of the file before you proceed.

Option 1 – Print to PDF

• First, you have to open the desired PDF file and tap the Ctrl + P keys to open the Print dialog box.
• After that, select the “Microsoft Print to PDF” option as the printer.
• Once the action is confirmed, it will regenerate another version of the PDF file with the default settings and merge all the existing layers into a single layer.
• On the other hand, you can also click on the “File” menu of the PDF file and select Print.
• From there, click on the Print button and select “PostScript (*.ps)” as the “Save as” type to save a PostScript copy of the original PDF file.
• Once you’re done, double click on the .ps file to open the file in the Adobe Distiller which will flatten the file automatically and convert it to a PDF file with only one visible layer.

Option 2 – Save the PDF file as an Optimized PDF file

If you are using the Acrobat Reader Pro version such as the Acrobat Pro, Foxit, and so on, you can try to flatten the layers by saving the PDF file as an Optimized PDF file. Refer to these steps to do so:

• Select File > Save as > Optimized PDF.
• Next, select the Transparency checkbox from the Settings window that opens.
• Then click on the Save button to apply and save the changes made. After that, the PDF text content should not disappear when you try to save a file on your Windows 10 computer.

There is a central location in Windows 10 that allows users to view all the notifications from its Action Center. Aside from viewing notifications, users can also manage them and take necessary actions in just one single place. Notifications in Windows 10 look similar to a message icon but can be at variance in function. However, recently, a number of users reported that even though they receive notifications about new actions but when opening them, they see nothing. In other words, the notification is false, and to fix this, read on as this post will provide you a couple of workarounds. The Windows 10 Notifications and Action Center notification messages might show a mismatch. For instance, Windows 10 may say that you have some notifications but when you open Action Center, you find it empty and there are actually no notifications there. Take the case of the following screenshot, the Windows 10 Notification says that there are 6 new notifications available for viewing but the Action Center says otherwise. Before you troubleshoot the problem, you might want to run System Restore especially if you’ve made some changes in your computer prior to this issue which might have messed with the Windows 10 Notifications and Action Center. To perform System Restore, refer to these steps:

• First, press the Win + R keys to open the Run dialog box.
• After that, type in “sysdm.cpl” in the field and tap Enter.
• Next, go to the System Protection tab then click the System Restore button. This will open a new window where you have to select your preferred System Restore point.
• After that, follow the on-screen instructions to finish the process and then restart your computer and check if the problem is fixed or not.

If the problem wasn’t fixed and you’re still getting false notifications, you might want to troubleshoot the problem further using the options given below.

Option 1 – via Windows PowerShell

• In the Start search, type “PowerShell” in the field and hit Enter to pull up the Windows PowerShell window.
• Next, copy and paste this command and hit Enter to execute it: Get-AppxPackage | % { Add-AppxPackage -DisableDevelopmentMode -Register “$($_.InstallLocation)AppxManifest.xml” -verbose }
• After that, reboot your computer and check if the false notifications are now gone.

Option 2 – Try renaming the Usrclass.dat file

DAT errors like the ones that are associated with the Usrclass.dat file, most likely occur during computer startup, program startup, or while you try to use a specific function in your program. Even so, it can easily be fixed. How? Refer to the given steps below.

• Tap the Win + R keys to open the Run dialog box.
• Then type %localappdata%MicrosoftWindows and hit Enter to get to the location of the UsrClass.dat file.
• After that, look for a file named UsrClass.dat and once you’ve found it, right-click on it and select the Rename option.
• Now rename the file to UsrClass.old.dat and then restart your computer and see if the problem is now fixed or not.