Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

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 bought Windows 7 last Oct. and installed it on my Mac laptop. In January, I installed it on my Mac desktop. It activated just fine, and I used it for a bit, installed some other programs, etc. A couple of months later I went to use the desktop version again (I don't need Windows often on my desktop), and it tried to get updates, but MS decided it wasn't a legit version and now it looks like a "bootleg" (which it isn't). I now understand that I need to pay for a 2nd license to get my desktop to be legal, and want to know what is the cheapest way to get the desktop fixed. Is there an "upgrade" path? What can I do?

share|improve this question
See also: FAQ about Windows Licensing – nhinkle Jul 4 '11 at 6:21

Buy a license, then open Computer Management and scroll to the bottom. There you will see "Change Product Key." That will allow you to put in the new key and activate. This will only work if they key you buy is for the same version that is installed.

Alternatively - from the command prompt:

cscript slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx
cscript slmgr.vbs -ato

The first line inputs the key from the command prompt (you need the hypens) and the second line does the activation.

share|improve this answer

The only legitimate way (meaning short of cracking WGA) is simply to buy a retail version of Windows 7 (same version) then run it.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .