How Do I Restore Windows 8 1 Without a Disk?

How do I factory reset my computer without a disk?

Restore without installation CD/DVD

1. Turn on the computer.
2. Press and hold the F8 key.
3. At the Advanced Boot Options screen, choose Safe Mode with Command Prompt.
4. Press Enter.
5. Log in as Administrator.
6. When Command Prompt appears, type this command: rstrui.exe.
7. Press Enter.

What do I do if I don’t have a Windows installation disc?

If you did not (or cannot) get an official Windows installation disc from your computer manufacturer, the only true alternative is to purchase a retail copy. You can try eBay for older versions of Windows, or purchase one from other legitimate online vendors.