Windows XP SP3 activation product key not valid.. Tags: Windows XP Last response: June 2, 2012 4:42 AM in Windows XP Share vomacka June 1, 2012 5:26:14 PM I recently re-formatted my HD and reinstalled my original copy of WinXP SP3. However, I am unable to get my WindowsXp Product key to work. When I go to activate the 25 digit key, it keeps telling me that it is invalid. I do not have the original paper with the key on it. I had to use a key-finder program to get the key from the registry. Is Microsoft still activating Windows XP product keys? I only have 29 days to re-activate the product key and windows XP. Scott More about : windows sp3 activation product key valid | E-mail me updates | Report abuse Register or log in to remove hang-the-9 June 1, 2012 6:50:49 PM I just activated an OEM XP license yesterday so it's working. The question is, is your key a legal one or did it get blacklisted? You can always try the phone support if it's a valid key. | Report abuse nhasian June 2, 2012 4:42:22 AM vomacka don't be afraid to contact Microsoft if you have trouble with your product key. they are happy to help. | Report abuse Ask the community Publish Tom's Hardware>Forum>Windows XP>Windows XP SP3 activation product key not valid..> Related ressources: ForumThe product key you used to install windows may not be valid ForumXp valid product key unauthorized after update ( valid for 4 years?)) ForumThe Windows Product Key you entered is not valid ForumWindows Product Activation on Corporate Key ForumChange the product key after activation ? ForumHow to Change Product Key on OEM WinXP machine ForumProduct key for windows xp professional sp3 for free ForumWindows xp activation key ForumWhat do i do if my windows product key is not valid Forummicrosoft window xp home edition 2002 PRODUCT KEY Forumhow to update product key with valid licence? ForumChange XP key for valid key ForumActivation wizard hangs/ won't load ForumCan i reinstall windows vista using product key on sticker ? ForumWIN XP SP3 ACTIVATION WORK AROUND ForumWindows Product Activation ForumPCMCIA slots need more power??? HELP! ForumHiren's boot cd/windows mini xp ForumSetting up an external to an xp windows computer ForumSetting up an external to an xp windows computer More resources Read discussions in other Windows XP categories Configuration Customization Drivers Security Video !