i have winxp sp2 home edition.during installation it says invalid Pro Key,how i slove this problem?

Contact Microsoft Support if you have original one.

You can download a windows XP sp2 cd key changer - It will allow you to change the cd key - and will provide you with alternative ones that will work.

But you will have to download the windows updates seperate and turn Auto update off - as window update has a verification tool, which stops you from downloading any further updates because you are using an illegal copy of windows.

Or You can download a version of WinXP black which has no serial and provides updates

Get yourself a XP Pro SP2 corp CD off of youtorrent.com

If you are in need of serial numbers/CD keys for any of the softwares try using the software serials 2000 v7.1.. I am not sure if it is a free version, but I am sure you can get hold of one in the torrents sites.. download that and install it ... this software will have cd key for most of the softwares.. incase if there are more than one key it will be listed there you can try one of them and you can install it.. I think you can get a copy from http://www.revengecrew.org/ ... good luck.

PS: there are other sites that gives passwords / cd cracks .. be carefull with them else you might end up in downloading viruses..

IF YOU ARE USING SOMEONE ELSES COPY OF XP,YOU WILL NEED THE KEY TO THAT COPY AND IT WILL WORK ONLY A FEW TIMES ON ANOTHER COMPUTER.IF THE KEY HAS BEEN REGISTERED AT MICROSOFT,IT WILL NOT WORK AT ALL FOR YOU.YOU CAN ALSO CONTACT MICROSOFT AND PURCHASE A SINGLE USER LICENSE FOR THAT DISK,PRETTY EXPENSIVE.YOUR BEST BET IS TO PURCHASE A OEM COPY OF XP PRO SP2 ON THE WEB FOR ABOUT$125.00.NO UNIVERSAL KEY THAT IM AWARE OF.

Are you using the same disk that came with your computer? If not get a disk (a copy is okay) of the same Windows that is on your Product key sticker on your computer. You may have to call Microsoft to activate but that is painless.

Buy an original windows xp copy. Don't support piracy.

Go to this site "http://www.magicaljellybean.com/keyfinder.shtml%22 their software is what you are looking for.

HEY UR KEY IS WRONG FIND ANOTHER ONE AND GET IT OK ITS NOT UR PC PRBLEM OR UR CD.