1. Check the basics
Unplug USB devices, check power and listen for beeps.
2. Use Startup Repair
Boot from a Windows USB, choose Repair your computer → Startup Repair.
3. Check the disk
Run chkdsk /f from Command Prompt in recovery mode.
4. Rebuild boot files
bootrec /fixmbr\nbootrec /fixboot\nbootrec /rebuildbcd
5. Reinstall if needed
Back up your files first, then do a clean install. Need help? Book our Windows installation service.