Windows 10 Troubleshooting -

If Windows won't boot, turn the computer off and on 3 times while it's starting to trigger the Advanced Startup menu (Troubleshoot > Advanced Options > Startup Repair).

If the computer is unstable, hold Shift while clicking Restart > Troubleshoot > Advanced Options > Startup Settings > Restart > Press 4 for Safe Mode . To give you a more specific fix, let me know: Windows 10 Troubleshooting

Fixes file system errors. In Admin Command Prompt, type chkdsk C: /f /x . If Windows won't boot, turn the computer off