Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I don't have my Windows 7 license key. I upgraded to the Windows 8 preview and now I am having problems with my computer because it says my preview expired and it keeps shutting it off.

I see you can buy a Windows 8 upgrade for $40. But someone told me I'll need my Windows 7 license. Is this true, or can I just put the upgrade on and have it work?

share|improve this question
If you have Windows 8 Release Preview installed you just use the upgrade tool to perform the installation. – Ramhound Jan 18 '13 at 17:55
Are you saying I won't need to enter the key? – Joe Jan 21 '13 at 19:23

When you use an upgrade version of Windows, you need to have a valid licence for a previous, eligible version of Windows. That licence is not freed up for use on another computer after the upgrade.

share|improve this answer
This doesn't go into enough detail. For instance Windows an eligible version is the Release Preview of Windows 8. – Ramhound Jan 18 '13 at 18:31
Are you saying I need the actual key? Or is it okay if I lose it but the machine is one with a verified license? – Joe Jan 21 '13 at 19:22
@Joe - You need to run the installer from within Windows to determine your eligability. – Ramhound Jan 22 '13 at 12:11

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.