The Program Install and Uninstall troubleshooter helps you automatically repair issues when you're blocked from installing or removing programs.

If you can't find an app or program, try the tips in See all your apps in Windows 10 and Program is not listed in add/remove programs after installation. If you get an error message when you're uninstalling, try the Program Install and Uninstall Troubleshooter.

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. Run the System File Checker tool (SFC.exe)

The Microsoft Defender Offline scan will automatically detect and remove or quarantine malware. 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.

How to block pop-ups in Microsoft Edge. In Edge, go to Settings and more at the top of your browser. Select Settings > Cookies and site permissions. Under All permissions, select Pop-ups and redirects. Turn on the Block (recommended) toggle.

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.

In an Office program, click the File tab. Click Options. Click Trust Center, and then click Trust Center Settings. Click Privacy Options. Under Privacy Options, select or clear Check Microsoft Office documents that are from or link to suspicious Web sites check box. Click OK.

Restore deleted files and folders or restore a file or folder to a previous state. Navigate to the folder that used to contain the file or folder, right-click it, and then select Restore previous versions.

To add a different search engine, perform a search in the address bar using that search engine (or a website that supports search, like a wiki site). Then go to Settings and more > Settings > Privacy, search, and services > Address bar and search.

You can use installation media (a USB flash drive or DVD) to install a new copy of Windows, perform a clean installation, or reinstall Windows. To create installation media, go to the software download website, where you'll find step-by-step instructions.