Hp Media Vault Software Install Disc. HP Desktop PCs - Windows 7, Vista, XP Product Activation This document pertains to HP and Compaq desktop computers that came with Windows 7, Vista, or XP operating systems. To help prevent software piracy, Microsoft requires that Windows is activated before it can be used as full-version software. Nov 09, 2011  HP pc re-install Windows XP Product key invalid I have purchased HP Compaq DC 7900 Convertible Minitower PC 3 years ago with downgrade to Windows XP (pre-installed when shipped). Business Statistics Levine 6th Pdf Printer. Recently, I have problem with my PC and re-formatted the pc.

Tried every possible links. Nothing is happening because its showing incorrect product key but the key i am applying is correct and used in other non oem windows xp PCs. How to apply that volume license without formatting HP Oem windows xp PC? Tried with; 1. Microsoft Key Updater tool, 2. Regedit with%systemroot% system32 oobe msoobe.exe /a Via proper procedure 3.

Other third party software to update/change [roduct key. Slmgr commands in cmd prompt not working for windows xp. Last Hope; Should I try above link??? Will it be safe to modify registry value and delete registry from regedit?