There is another way to remove windows activation product.

• Click Start -> Run and type REGEDIT -> Enter

• Goto key HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WPAEvents

• Double click on OOBETimer and change all content with this one FF D5 71 D6 8B 6A 8D 6F D5 33 93 FD

• Back to WPAEvents folder and Right Click -> Permissions

• Select to System and check all of Deny Listbox

• Reboot Your PC