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 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. m 0 l 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. m 0 l Can't find your answer ? Ask ! Publish Related resources Product key for windows xp professional sp3 for free Forum window xp pro Dell inspiron 8100 product key for activation Forum SolvedWhy is windows 7 product key not valid? Forum SolvedHow to tell if my product key is valid? Re-installing Windows 7? Forum the product key you entered does not appear to be a valid windows 7 product key Forum Xp valid product key unauthorized after update (valid for 4 years?)) Forum Windows 7 activation/product key Forum What do i do if my windows product key is not valid Forum The Windows Product Key you entered is not valid Forum windows 7 activation product key Forum SolvedCan I use the same product key to re-activate windows? Forum Need help. Reinstalling Windows XP SP3 on same machine but no CD / licence key Forum SolvedWill a Windows XP Media Center activation key work with Windows XP Professional? Forum Solvedhow do i override my system and install windows xp pro with only the oem product key Forum I need to buy/find product key for activation of my window vista... they tell me Forum Windows Product Activation on Corporate Key Forum I have a Windows 7 Pro disc with the appropriate product key but it won't validate and says invalid product key. I have insta Forum SolvedProduct key forMICROSOFT WINDOWS XP Forum how to activate windows7 professional after re-installation where change the product key is not in my computer's property Forum Will a Windows 8.1 OEM product key activate a Windows 8.1 retail ISO easily? Forum More resources Read discussions in other Windows XP categories Configuration Customization Drivers Security Video !