What does SFC Scannow actually do?

Related questions

1. What does chkdsk R F do?
2. What will SFC Scannow do?
3. What is SFC Scannow in Windows 10?
4. What is window corrupt?
5. How do I know if my Windows file is corrupted?
6. What is the purpose of SFC Scannow?
7. How do I run SFC Scannow in safe mode?
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Tags

1. #windows
2. #windir
3. #located
4. #protection
5. #corrupted
6. #command
7. #violations
8. #placeholder
9. #resource
10. #dllcache
11. #protected
12. #system
13. #integrity
14. #replace
15. #files
16. #compressed
17. #represents
18. #folder
19. #operating
20. #cached
21. #scannow
22. #system32