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)

Learn how to use Manage and Optimize Drives to keep your disk and data drives defragmented and at top performance in Windows.

To start the Disk Cleanup tool and specify the hard disk to be cleaned by using the command line, follow these steps: Click Start, and then click Run. c:\windows\SYSTEM32\cleanmgr.exe /d Drive Note In this command, the placeholder Drive represents the drive letter of the hard disk to be cleaned.

Dumpchk is a command-line utility you can use to verify that a memory dump file has been created correctly. Dumpchk does not require access to symbols. You can download debugging tools for Windows products from the following Microsoft Web site:

Learn how to update drivers in Windows using Device Manager to update or reinstall a driver.

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.

Free up drive space in Windows. If your PC is running low on free space, you might not be able to install important Windows updates, and your PC’s performance may be affected. Here are some ways to free up space so you can keep your PC up to date and running smoothly.

Fixes an issue in which an MS-DOS-based program crashes on a computer that is running Windows 7 because of a change in the Dosx.exe file. This issue occurs when the program uses the MS-DOS protected mode interface.

Data Execution Prevention (DEP) is a technology built into Windows that helps protect you from malicious code launching from areas of memory that have been designated as for data only.

Windows 11. PC Health Check app brings you up to date info on your Windows device health, helping you take action to improve your device performance and troubleshoot performance problems. It is periodically updated based on customer feedback to help you make the most of your Windows PC. How to open PC Health Check.