Block you from uninstalling a program through Add or Remove Programs (or Programs and Features) in Control Panel. If you're trying to remove malware, you can use Windows Security (or another antivirus tool), or you can use the Windows Malicious Software Removal tool.

If some Windows functions aren't working or Windows crashes, use the System File Checker to scan Windows and restore your files. Though the steps below might look complicated at first glance, just follow them in order, step-by-step, and we’ll try to get you back on track.

Learn how to remove malware from your PC. Use Microsoft Defender Antivirus in Windows 10 or Windows 11 to scan your PC for malware, viruses, or other threats.

If you trust a file, file type, folder, or a process that Windows Security has detected as malicious, you can stop Windows Security from alerting you or blocking the program by adding the file to the exclusions list.

You can now restore lost or accidentally deleted favorites in Microsoft Edge with our new favorites recovery feature. You'll need to be signed in to your Microsoft account and have the sync setting turned on to use the favorites recovery feature.

To fix this problem automatically, run the "Fix problems that programs cannot be installed or uninstalled" troubleshooter to repair issues that block program installation or removal because of corrupted registry keys.

This article describes how to permanently remove the contents of the Temporary Internet Files folder from your computer. Watch a video about how to delete the contents of the Temporary Internet Files folder yourself.

Windows Security has reputation-based protection that can help protect your PC from potentially unwanted applications. Potentially unwanted app blocking was first introduced in the Windows 10 May 2020 update and is turned off by default for enterprise and consumer customers.

All Outlook Data Files (.pst) and Offline Data Files (.ost) are listed along with the name of the account the files are associated with. If you cannot open your Outlook data file or suspect that the file is damaged, use the Inbox Repair tool (scanpst.exe) to repair errors in the file.

When you try to access or work with files and folders in Windows, you experience one or more of the following issues: Issue 1: You receive an "Access Denied" error message or a similar message. Issue 2: You cannot access, change, save, or delete files and folders.