Computer Slow Command's

chkdsk

chkdsk /f -> will see if there's any errors.

chkdsk /r -> Check for issues and fix them.

sfc

sfc /scannow -> Check system files and if they are bad it will fix them or replace them.

DISM

DISM /online /Cleanup-Image /scanhealth -> This will fix your system image

DISM /online /Cleanup-Image /restorehealth