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) To do this, follow these steps:

Microsoft Defender Antivirus is a powerful tool that finds and removes malware from your PC. Here's how to use it in Windows 10 or 11 to scan your PC. Important: Before you use Microsoft Defender Offline, make sure to save any open files and close apps and programs. Open your Windows Security settings.

在命令提示符处，键入以下命令，然后按 Enter 键： sfc /scannow 命令将扫描所有受保护的系统文件，并用位于 %WinDir% \System32\dllcache 的压缩文件夹中的缓存副本替换损坏的文件。 %WinDir% 占位符代表 Windows 操作系统文件夹。 例如：C:\Windows。 注意 在验证 100％ 完成之前，请勿关闭此命令提示符窗口。 此流程完成后将显示扫描结果。 流程结束后，你可能收到以下消息之一： Windows 资源保护找不到任何完整性冲突。 这表示您没有任何丢失或损坏的系统文件。 Windows 资源保护无法执行请求的操作。

Launch the Xbox app for PC. Click your Profile picture. Click on Support. Click on Gaming Services Repair Tool. Click on Start Troubleshooting.

Windows 10. 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. Windows 11 Windows 10.

Windows 7 Windows 8.1 Windows 10. Follow these steps to automatically diagnose and repair Windows security problems by turning on UAC, DEP protection, Windows Firewall, and other Windows security options and features. Select the Download button on this page.

How to remove malware or viruses from my Windows 10 PC. Microsoft Defender Antivirus and Windows Firewall are on your device to help protect it from viruses and other malicious software. But if you think they've missed something run Microsoft Defender Offline which can sometimes detect malware that others scanners missed. Get help from Microsoft.

You may be using an outdated or corrupted video driver. System files on your PC may be corrupt or mismatched with other files. You may have a Virus or Malware infection on your PC. Some applications or services running on your PC may be causing Windows Explorer to stop working.

Select Start > Settings > Windows Update > Check for updates and then install any available updates. If the problems aren't all resolved, try running the troubleshooter again to check for additional errors, or see Fix Windows Update errors and follow the troubleshooting steps.

Blue Screen errors (also sometimes called black screen errors or STOP code errors) can occur if a serious problem causes Windows to shut down or restart unexpectedly. You might see a message that says, "Windows has been shut down to prevent damage to your computer" or a similar message.