How to start Windows 10 in safe mode

What is 0x0000007E Error Code?

If you’ve been experiencing a 0x0000007E error code pop message on your PC frequently then you need to get it fixed before it causes serious damage to your system. 0x0000007E is a Stop error or Blue Screen of Death error code. This error message turns your computer screen blue and locks you out of the program running on your computer. It freezes your system and hampers your ability to perform any type of task on your PC.

Solution

Error Causes

Error 0x0000007E, a blue screen of death error triggers registry issues. It’s not easy to narrow down the cause of 0x0000007E as it results due to many reasons like memory overload, cluttered disk space, viral infection, malware attack, and if the hardware malfunctions. Ignoring 0x0000007E error pop up is not wise. It is more like a warning of the serious damage that can happen to your PC if it is not fixed timely. It also leads to slowing down the system and increases boot time. This error message exposes you to dangerous Windows PC threats like registry corruption and damage. Registry corruption can lead to system crash and failure and you may also lose all your important data saved on your PC.

Further Information and Manual Repair

Install Restoro

You don’t always have to spend hundreds of dollars to hire a technician to fix error pop-ups on your PC try using Restoro Restoro is an advanced and multi-functional PC repair tool with a comprehensive suite of powerful features designed to resolve almost all types of PC errors in seconds including 0x0000007E error code. It is a next-generation PC repair tool that serves as a system optimizer, anti-virus, and quality registry cleaner. Its built-in intuitive technology enables Restoro to scan, identify and repair the ultimate cause of the error code 0x0000007E in just a few seconds. Eventually, it spares you from the hassle of finding the root cause of the 0x0000007E error message and then selecting a tool specifically designed to resolve only that particular cause with limited features. This highly functional PC error tool is the answer for all your registry issues. By running Restoro on your PC, you can fix the 0x0000007E BSOD error code and avoid registry corruption.

Why Restoro?

The smart registry cleaner utility embedded in this tool enables it to scan for registry errors and clear up disk space accumulated by junk files, internet temporary files, invalid entries, and other types of unnecessary files taking up a good chunk of your disk space. This clutter also slows down your PC performance as it requires more power than it has to run the system because of the excess load on the RAM. However, by wiping out the clutter with this helper, you can optimize the speed of your PC and see a significant difference in its performance. Restoro backup feature enables you to create backup files for safety purposes. Furthermore, it has several other built-in value-adding features like privacy error utility and system stability utility for enhanced functionality. To resolve the error code 0x0000007E in seconds, all you need to do is download and install Restoro on your system and run it to scan for errors. In a few seconds, you will see a scanning report with comprehensive details of the types of PC damages. To fix the issue right away, create backups and click ‘fix’ to resolve. In just a few clicks you can repair your PC. Download Restoro Today!

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.

One of the most useful and efficient command-line disk management tools is the DISKPART utility. It can be used to manage, delete or create new hard drive partitions. However, despite its efficiency, there are still times it could face some errors like the “No usable free extent could be found”. You can encounter this error when you create a partition. This error could be due to insufficient disk space which is why it is not able to carry out the operation. It is also possible that the disk is not recognized by the system. And since there are only four recognized primary partitions, when you try creating a fifth one, you will get this error. In addition, this error could also occur if the disk has been partitioned using the MBR disk partitioning format. To fix the “No usable free extent could be found” error, here are some suggestions you can follow.

Option 1 – Free up disk space using Storage Sense

The error could be caused by insufficient disk space in your computer and so you need to free up disk space using Storage Sense to fix the problem.

• Open Setting > System > Storage from the WinX Menu.
• From there, you will see a list of all the local and connected storage devices along with the details on the free space. Make sure that Storage Sense is on.
• Next, find a link that says “Free Up Space” and click it to open.
• After that, a screen which is the built-in program in Windows 10 will appear and will scan your computer for the following junk files so you can free up disk space:
  • Windows Upgrade Log Files
  • The system created Windows Error Reporting Files
  • Thumbnails
  • Temporary Internet Files
  • Previous Windows Installation Files
  • Delivery Optimisation Files
  • DirectX Shader Cache
• Choose the files you want to get rid of and then click on the remove files option. Note that you’ll have an idea of the total size as you select any of the junk files listed above.
• Now go to the “Free Up Space Now” section and click the Clear Now button. This will get rid of all the temporary or junk files in your computer and should hopefully fix Error 1310.

Note: You can also run the Disk Cleanup tool to free up disk space.

Option 2 – Try to run DISKPART in Command Prompt with administrator permissions

The next thing you can do to resolve the error is to run the DISKPART utility with admin privileges.

• In the Start Search, type “command prompt” and from the search results that appear, look for Command Prompt.
• Once you found it, right-click on it and select the “Run as administrator” option.
• After that, try to execute the Diskpart operation once again. Note that you also have to specify different size & offset values for the partitioning and then see if you still encounter the same error.

Option 3 – Try to execute the DISKPART clean command

The next thing you can try is to execute the clean command in DISKPART to fix any issues in the disk.

• Open Command Prompt with admin privileges.
• Then execute this command: diskpart
• The command you entered will initiate the DISKPART utility. Now execute this second command to view all the disk connects or all the partitions on those disks formed: list disk
• After that, you need to select one command depending on the list command you executed and then execute this third command: select disk #
• The third command you just executed will select the disk or partition you want to select. Now execute this fourth command: clean
• The command you entered will remove all the volumes or partitions formatting the disk in focus.
• Once it’s done, try to carry out the DISKPART operation you were trying to execute.

Option 4 – Try to update the USB drivers

Outdated USB drivers can also be the reason why you’re getting the error. Thus, you must update them from time to time. You can install the latest version of the USB driver for your system. But you need to check the manufacturer’s website or guidelines to update the driver according to your system. If it happens that the drivers might not be compatible with the version of the system your laptop is using which is unlikely, you can run the driver software in Compatibility Mode in that kind of situation. To update your USB drivers, follow these steps:

• Tap the Win + R keys to launch Run.
• Type in devmgmt.msc into the box and tap Enter or click OK to open the Device Manager.
• After that, look for the USB Serial Bus controllers from the list of device drivers displayed. If you see a red or yellow sign that shows up against the driver, right-click on the driver’s name and select “Update Driver Software”. And if you find any “Unknown device”, you need to update it as well.
• Select the “Search automatically for updated driver software” option and then follow the instructions to complete the process.

Option 5 – Run the Hardware and Devices troubleshooter or the USB troubleshooter

You can find the Hardware and Devices troubleshooter under the Troubleshooters section of the Windows Settings panel on your Windows 10 PC. You can use this troubleshooter to fix common hardware and external device-related issues without exerting too much effort. If you don’t know where to find it, follow these steps:

• Tap the Win + I keys to open the Windows Settings.
• Next, navigate to Update & Security > Troubleshoot.
• You should see the option for Hardware and Devices on your right-hand side where you can also find the “Rub the troubleshooter” button – click on it to get started.
• Follow the next on-screen instructions to fix the basic issues of common hardware and external device.

Note: If you want to, you can also use the USB Troubleshooter to fix the problem just go back to the Troubleshoot page where you can find it.

If you are running Windows Update on your Windows 10 computer and you suddenly encounter error code 0x8000FFFF, E_UNEXPECTED – Unexpected failure then read on as this post will give you a couple of suggestions to resolve this problem. Note that you can encounter this error not only on Windows Update but also on Microsoft Store apps at times. Follow the options given below to fix error code 0x8000FFFF, E_UNEXPECTED – Unexpected failure error on your Windows 10 PC.

Option 1 – Try to reset the Microsoft Store cache

Just like browsers, Microsoft Store also caches as you view apps and games so it is most likely that the cache is no longer valid and must be removed. To do so, follow the steps below.

• Right-click on the start button and click on Command Prompt (administrator).
• Next, type in the command, “wsreset.exe” and tap Enter. Once you do, the command will clear the cache for the Windows Store app.
• Now restart your PC and afterward, try opening Microsoft Store again.

Option 2 – Check the Cryptographic Service

• Tap the Win + R keys to open the Run dialog box.
• Next, type “services.msc” in the field and hit Enter or click OK to open Services.
• From the list of Services, look for the Cryptographic Service. Then right-click on it and select Properties from the context menu.
• After that, check if the service is started by checking the Service status. If it is started, click on the Stop button to stop the service and if it is already stopped, leave it as it is, at least for now.
• Next, make sure that the Startup type menu in the Service’s properties is set to Automatic before you go on.
• Now confirm any dialog boxes that may appear as you set the Startup type and then click on the Start button located in the middle before you exit Properties.

Option 3 – Delete the contents in the Software Distribution folder and Catroot2 folder

• 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.

After resetting the SoftwareDistribution folder, you need to reset the Catroot2 folder to restart the services you just stopped. To do that, follow these steps:

• Type each one of the following commands.

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

• After that, exit Command Prompt and restart your computer, and then try to run Windows Update once more.

Option 4 – Check the Root Permissions

You might also want to check the permissions on the root of C: and make sure that “BUILTINUsers have read access because if it doesn’t, then no wonder why you’re getting the error code 0x8000FFFF.

Option 5 – Try to use the Media Creation tool

The Media Creation tool in Windows allows you to use the ISO installation file to make a bootable device that you can use to install Windows on your PC. Note that this is kind of different from the usual installation process as it could erase your computer’s current settings and data on the primary drive. Thus, before you proceed, you need to backup all your data into some removable drive and then use the Media Creation Tool to make a bootable drive.

• After making the bootable drive, you need to plug it into your computer and then reboot.
• Next, tap the F10 or Esc key to open the boot options.
• Now set the boot priority of the removable drive the highest. Once the setup comes forth, follow the next onscreen instructions and install Windows without any problems.

Option 6 – Try installing the updates in a Clean Boot State

It could be that some third-party application is the one that’s causing the problem so it’s best if you put your computer in a Clean Boot state. During this state, you can start the system with a minimum number of drivers and startup programs that will surely help you in isolating the root cause of the issue.

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

Note: If you are able to install the app without any trouble at all then it means that the error is caused by some third-party application in your computer. You need to look for the culprit and uninstall it once you found it.

Option 7 – Run the Windows Update Troubleshooter

Running the built-in Windows Update troubleshooter is one of the things you can first check out as it is known to automatically resolve any Windows Update errors like error code 0x8000FFFF. 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.

Like in Windows 10, Windows 11 will also support God mode to be enabled and used. For those readers that do know what God mode is, let me explain it in simple terms. God mode is the icon on the desktop that once clicked will open and let you adjust every option in the control panel and some hidden features for Windows inside one application. There are a lot of advantages to having this one-click fast access to features, especially if you are a power user. Luckily creating such an awesome icon and enabling God mode is very easy to accomplish, all you have to do is:

1. Create a new folder where you want to have the God mode icon
2. Rename folder exactly: {ED7BA470-8E54-465E-825C-99712043E01C}
3. Enjoy God mode

As you can see creating and accessing all settings at your fingertips is much easier than most people think. Enjoy your ultimate access to Windows 11 features and if you wish you can drag and drop sections from it into the desktop or anywhere for easy access to that specific topic.

Hello and welcome to another problem-solving tutorial on errortools.com. Today we will be solving error 0x80070057, we could not format the selected partition which occurs during setup and installation when performing a clean install of Windows from a USB drive. So, you have backed up your files and decided to format and do clean WIndows installation, you have your USB ready, you reboot the system, plug in USB, start Windows setup, choose the hard drive on which you want to do a clean install and then this happens. This error is very frustrating and it annoys pretty much anyone who encountered it but do not worry we have a solution for you. First thing is to confirm the error prompt, Click on the OK button and then on X to exit Windows 10 installation wizard. Click on yes to confirm that you want to exit the setup. You will find yourself in original installation windows. On that screen choose and click on Repair your computer. Choose an option screen that will pop up, click on Troubleshoot. In the advanced options, click on the command prompt. Once you are in command prompts type DISKPART and hit ENTER In the diskpart prompt type LIST DISK and hit ENTER again. type SELECT DISK #, where # is listed disk number where you would like to install Windows. type LIST VOLUME in order to list volumes in the selected disk and hit ENTER You need to select the volume on which you would like to place your WINDOWS, to do this type in SELECT VOLUME #, where # is the listed number of the volume Finally, type FORMAT FS=NTFS and hit ENTER You have successfully formated a given volume, you can now exit DISKPART and return to setup, to exit DISKPART simply type exit and hit ENTER. Leave command prompt as well by again typing exit and hitting ENTER You will be returned to Choose an option screen, click on Turn off your PC. Your drive has been successfully formatted and it is ready for clean Windows installation, you can now restart your Windows 10 installation and the process will complete without errors.

As you know, both the Windows Update and Windows Store are inter-dependable services in Windows 10 operating system. So when one of these services encounters an error like the “0x80070424, ERROR_SERVICE_DOES_NOT_EXIST”, the other service will most likely get this error as well. Note that this kind of error can occur to both the Windows Update Standalone Installer and to the Windows Update section in the Windows 10 Settings app. Some users also reported getting this error while trying to update Windows Defender as well. You can see the following error message in the Windows Update Standalone Installer:

“Installer encountered an error: 0x80070424, The specified service does not exist as an installed service.”

While you’ll see the following error message in the Windows Store:

“The were some problems installing updates, but we’ll try again later. If you keep seeing this and want to search the web or contact support for information, this may help: (0x80070424).”

To fix this error, you can try to re-register the Background Intelligent Transfer Service DLL file or run the Windows Update and Store apps troubleshooters. You can also reset the Windows Update-related folders or the Microsoft Store or fix the Windows Update files by using the DISM tool. On the other hand, you can also use the Registry Editor or check Windows Services. For more details regarding these potential fixes, refer to each one of the given options below.

Option 1 – Try to re-register the Background Intelligent Transfer Service DLL file

You may have to re-register the Background Intelligent Transfer Service DLL file using the regsvr32.exe before you can successfully install the program and fix ntdll.dll file crash error. The Regsvr32 tool is a command-line utility that can be used to register and un-register OLE controls as DLL and ActiveX (OCX) controls in the Windows operating system. Follow the steps below to use it.

• Open Command Prompt as admin from the WinX menu.
• Next, type the following commands in the elevated Command Prompt and hit Enter to execute the command. This will re-register the affected DLL file using the Windows operating system tool, regsvr32.exe.
  • regsvr32 Qmgr.dll /s
  • regsvr32 Qmgrprxy.dll /s

Note: Replace “[DLL file]” with the name of the DLL file that was pointed out in the error.

• After you execute the given commands, you should see a message saying, “DllRegisterServer in vbscript.dll succeeded” if the Regsvr32 tool was able to run successfully.
• Now restart your computer and check if the error is now fixed.

Option 2 – Try to run the Windows Store or the Windows Update Troubleshooters

The Windows 10 Store Apps Troubleshooter will help you in fixing the Error code 0x80070424. This is a great built-in tool from Microsoft that helps users fix any app installation issues. So this is worth a try to solve the problem. This built-in tool also helps you fix the Windows 10 Store if it isn’t working. To use the Windows Store Troubleshooter, follow the steps below.

• Tap Win + I keys again to open the Windows Settings panel.
• Go to Update & Security and then go to Troubleshoot.
• On your right hand side, scroll down to find the Windows Store Apps and then click on Run the troubleshooter option and see if it fixes the problem.

Note: You can also try running the Windows Update troubleshooter to fix the error. You can run it under the Windows Update section of Update & Security.

Option 3 – Delete the files from Software Distribution Folder & Catroot2 folders

The downloaded Windows Updates are placed in a folder called “SoftwareDistribution”. The files downloaded in this folder are automatically deleted once the installation is completed. However, if the files are not clean up or if the installation is still pending, you can delete all the files in this folder after you pause the Windows Update service. For complete instructions, refer to these steps.

• 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, got to the C:WindowsSoftwareDistribution folder and get rid of all the folders and files there by 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.

After resetting the SoftwareDistribution folder, you need to reset the Catroot2 folder to restart the services you just stopped. To do that, follow these steps:

• Type each one of the following commands.

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

• After that, exit Command Prompt and restart your computer and then try to run Windows Update once more.

Option 4 – Try to reset the Microsoft Store cache

Just like browsers, Microsoft Store also caches as you view apps and games so it is most likely that the cache is no longer valid and must be removed. To do so, follow the steps below.

• Right click on the start button and click on Command Prompt (administrator).
• Next, type in the command, “wsreset.exe” and tap Enter. Once you do, the command will clear the cache for the Windows Store app.
• Now restart your PC and afterwards, try opening Microsoft Store again and then see if Error Code 0x80070424 is resolved or not.

Option 5 – Try to check the Windows Update or WU setting in the Registry

• Tap the Win + R keys to open the Run utility and type “regedit” in the field and tap Enter to open the Registry Editor.
• Next, go to this registry path: ComputerHKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindowsWindowsUpdate
• Here, look for the DWORD named “DisableWindowsUpdateAccess” and double click on it and then set its value data to “0”.
• Exit the Registry Editor once you’re done and restart your computer.

Option 6 – Try to check the status of some Windows Update Services

• Tap the Win + R keys to open the Run dialog box.
• Next, type “services.msc” in the field and hit Enter or click OK to open Services.
• From the list of Services, look for the following services and make sure that their Startup type is as follows:
  • Windows Update Service – Manual (Triggered)
  • Background Intelligent Transfer Service – Manual
  • Workstation Service – Automatic
• After that, check if the Service status of the listed services above are set to Running. If they’re not, click on the Start button to start these services and then check if you can now enable the Windows Update service or not.

Option 7 – Run the DISM tool

You can also run the Deployment Imaging and Servicing Management or DISM tool to fix the error code 0x80070424. Using this built-in tool, you have various options such as the “/ScanHealth”, “/CheckHealth”, and “/RestoreHealth”.

• Open the Command Prompt with admin privileges.
• Then type in the following commands and make sure to hit Enter right after you type each one of them:
  • Dism /Online /Cleanup-Image /CheckHealth
  • Dism /Online /Cleanup-Image /ScanHealth
  • exe /Online /Cleanup-image /Restorehealth
• Do not close the window if the process takes a while as it will probably take a few minutes to finish.
• Once it’s done, reboot your computer and check if it has fixed the error.

As in previous Windows 10, inside Windows 11 also when you press the ALT + TAB key combination you will get a preview of all running applications along with all Browser tabs so you can go through them and pick the one you want to switch to. Alto, I personally am a big fan of alt-tabbing, I must admit that I am not a big fan of having multiple browsers tabs on screen when I do press key combo. Luckily there is a very easy way to turn this feature off. Turning browsers tabs thumbnails off

1. Press ⊞ WINDOWS + I to open settings
2. Click on System in the sidebar
3. Scroll down and select Multitasking
4. Find Alt + Tab section and click on the drop-down menu
5. Pick Open Windows Only
6. Close settings

Now when you press the ALT + TAB key combination you will still see your browser but only an active tab in it instead of all tabs as different preview thumbnails.

Valve has released a big update to its online store and distribution platform Steam. Among typical bugs fixing and making the user experience a little more fluid, we have received some major updates as well. Please take note that you need to update Steam itself to the latest version in order to get new features.

Storage management Page update

The storage management page has received a complete redesign and UX overhaul and it is now much easier to manage your game libraries and create new ones. The page itself looks and feels a little console more like but thanks to that it offers a much easier and clearer look and feel. Another thing with the Steam store management page is the ability to move installation files from one location to another. Let’s say that you have two or more hard disk drivers in your machine and that you have SSD that you use for running stuff since it is fast and larger and slower one for storage. Now you can easily and quickly move one installation from one to another in order to take advantage of your faster SSD for quicker LOAD game times without making a new installation.

Steam Download page improvements

The download page has also received some love from Valve by enabling us to now see the installation progress. So far on the download page of Steam, you would only get download progress but it has been updated to show installation progress after download as well now making it more straightforward and giving you a general idea of how much more time there is to wait in order to start gaming. Also, you can now drag and drop items in the download bracket to reorder download orders or place them as active downloads to start downloading right away.

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.