How can I repair corrupted system files to fix the c000021a error?

Question

Grade: Education Subject: Support
How can I repair corrupted system files to fix the c000021a error?
Asked by:
66 Viewed 66 Answers

Answer (66)

Best Answer
(320)
You can use the System File Checker (SFC) tool. Boot into Safe Mode with Command Prompt (repeatedly press F8 during startup). Then, type `sfc /scannow` and press Enter. This will scan and attempt to repair corrupted system files. If SFC fails, consider using the DISM tool: `DISM /Online /Cleanup-Image /RestoreHealth`.