+ 0 Votes call microsoft jbaker.it 2 years ago Microsoft will show you how to change the product key + 0 Votes If not XP upgrade to Win8 redave 2 years ago Win8 is smaller and faster than Win7. Use it in desktop mode. Metro may be confusing. + 0 Votes I don't know if it's still available, but some years ago I got hold of a Deadly Ernest 2 years ago program called RockXP - file is rockxp.exe - which has some great tools for fine tuning Win Xp performance and also includes a tool whereby you can change the registration key of the installed software. I used it several times where someone had a valid licence for Win XP but their install discs were damage or unfindable. I used my valid XP discs to reinstall the software, loaded RockXP, changed the registration key from the one I used to do the install (my key) to their key, went on-line and did the activation and updates, no troubles at all. The only issue here is that in each case I was using my Win XP Pro to rebuild XP Pro systems and Win XP Home to rebuild XP Home systems, don't know how it'll go with a XP Pro install and a XP Home key. + 0 Votes Find some copy of HP's OEM Windows XP CD dimitrov_d 2 years ago Find HP's OEM version of WinXP installation media. It will not ask you for ser. number nor activation. This installation CD you can install on each HP (even old Compaq) hardware.