some commands to try to repair a windows system.

use F8 at startup to get the command line.

get the disk names

• diskpart –> list volume –> exit

or

• wmic logicaldisk list brief

• chkdsk c: /f /r (scan and repair bad clusters)
• rstrui.exe (run restoration points)
• sfc /scannow (replace broken system files)
• bootrec /fixboot or bootrec /rebuildbcd (repair boot)