Fix How to Bypass Windows XP Activation

Beginning with Windows XP, Microsoft put into place a verification system meant to reduce the amount of piracy of the Windows XP Operating System (OS).
Windows Product Activation (WPA) requires users to verify their OS, and if verification fails, the OS ceases to work. Unfortunately, some XP users have discovered their OS being mistakenly rendered useless by WPA, which is why you may be seeking to bypass WPA. Bypassing WPA, while not an easy process, is actually possible by editing a registry entry.

Windows xp logo

Instructions

Click the "Start" button. Then click "Run" and type in "regedit" minus the quotes. Click "OK" and the Registry Editor will appear.
Find key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WPAEvents Click it once to see what is inside the entry
Click it once to see what is inside the entry.

Read more : http://www.ehow.com/how_5463503_bypass-windows-xp-sp-activation.html

Click it once to see what is inside the entry.

Read more : http://www.ehow.com/how_5463503_bypass-windows-xp-sp-activation.html
see the string OOBETimer
Double click.change all content with this one FF D5 71 D6 8B 6A 8D 6F D5 33 93 FD
Hit "OK" to confirm the change.
Right Click on WPAEvents(Regedit) and choose Permissions, Then click "System" and "Permissions for System."
Click all the boxes under the "Deny" field so that they are all checked. This prevents Windows from re-activating WPA
Click "OK" and then exit Registry Editor. WPA will now be disabled
restart your PC