Take the 2-minute tour ×  Possible Duplicate: Best way to
retrieve license information  The kid's computer is infested
with viruses, and I want to wipe it clean and reinstall XP. I
can't find the XP CD and box with the key sticker anymore. I
have an installation CD from MSDN but for correctness reasons
would like to use the original personal license. Is there a way
to find out the activation key for the currently installed
instance?  Control Panels -> System shows registered to, with a
registration number, but it doesn't look like an installation
key (i.e. it's only digits, not alphanumeric)  share|improve
this question  marked as duplicate by hyperslug, Jeff Atwood Sep
24 '09 at 4:44   More here: superuser.com/questions/43196/… – 
hyperslug Sep 24 '09 at 4:26 And here
superuser.com/questions/32367/… –  hyperslug Sep 24 '09 at 4:27
2 Answers 2  up vote 2 down vote accepted  You can use the (open
source!) Magical Jelly Bean Keyfinder.  share|improve this
answer  Jelly Bean is probably the most popular. Here's