When critical Windows system files are missing or corrupted, your operating system may begin to malfunction. Common symptoms include Windows features not working properly, system errors, or Windows becoming unresponsive or freezing.

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To update a Surface Pro 8 with build 22621 of Windows 11, choose SurfacePro8_Win11_22621_25.083.35877.0.msi. Note: If there isn’t an .msi file that corresponds to the Windows build you have installed, select the .msi file that's closest to (but still lower than) your build number.

Access, download, or run the Surface app and the Surface Diagnostic Toolkit to help find and solve Surface problems.

The following are common methods that are used to install software: Select the folder for the program that you are trying to uninstall, and then open the folder.

Find how-to articles, videos, and training for Microsoft Copilot, Microsoft 365, Windows 11, Surface, and more.

Some icons in My Computer, in Windows Explorer, on the desktop, or on the Quick Launch Bar change randomly. Troubleshoots and fixes common issues with file and folder operations in Windows.

There are different ways to remove apps and programs, so if you can't find the one you're looking for, you can try another location. Note that some apps and programs are built into Windows and can't be uninstalled. You can try to repair a program first, if it's just not running correctly.

Regsvr32 is a command-line utility to register and unregister OLE controls, such as DLLs and ActiveX controls in the Windows Registry. Regsvr32.exe is installed in the %systemroot%\System32 folder in Windows XP and later versions of Windows. The 64-bit version is %systemroot%\System32\regsvr32.exe.

For volume licensing support, open your Microsoft 365 admin center, select Help & support, and search for "manage volume licensing" or submit an online support request. Don't forget to include your license ID or agreement number, your contact phone number & email address so we can contact you.