1. Safe mode --> ccleaner
2. restore previous backup point
3. run scandisk/defrag/memory check
4. Safe mode --> enable services one by one (restart everytime) until you discover the rouge one, then attempt to fix.
Gamit ka ng live cd ng linux sa usb msg boboot os then kunin mo na files mo then reinstall os. Try mo rin patungan disk d mo ng os. Tas yun i boot mo then access files mo