Repair Windows with DISM, SFC and CHKDSK

Choose the tool for the symptom

DISM repairs the Windows component store used for servicing. SFC verifies protected system files and replaces damaged copies. CHKDSK checks filesystem metadata and, with specific options, surface/read issues. None of them tunes FPS or repairs failing hardware.

Supported repair sequence

Open Terminal or Command Prompt as administrator. First check the component store:

DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth

CheckHealth reads whether corruption was flagged. ScanHealth performs a deeper scan. RestoreHealth repairs using configured Windows Update or a specified source. It may appear paused; let it finish while the PC has reliable power and connectivity.

Then verify protected files:

sfc /scannow

Restart and run it again only when the report says repairs require it or corruption remains. Repeating SFC daily is not maintenance.

Filesystem check

For an online, non-disruptive NTFS scan:

chkdsk C: /scan

/f schedules or performs fixes and may require an offline restart. /r adds a full readable-sector scan and can take a very long time, especially on a hard drive. Use it for suspected media errors, not as an SSD tune-up.

Read the result

If DISM cannot find source files, match official Windows installation media to the installed version and language, then use Microsoft’s documented /Source syntax. If corruption returns, investigate storage health, RAM stability, interrupted updates, malware and overclocks. A clean repair followed by immediate corruption is a symptom—not a reason for an endless command loop.