Then you will want to Activate by phone so Click on “Activate by phone” (no you will not be activating by phone). Choose Run from start menu again and type in this command: “oobe/msoobe /a” (without the quotes of course) to get the activation screen.You can not change it to let’s say “fg” because the value “g” does not exist in the hex-decimal system.) This will deactivate windows. Example: If it says “ff d5 71 d6 b3 8d…” Change the “ff” to “1f”. (Important: The hex-decimal format consists only of the numbers 1 thru 9 and the letters a through f. Keep in mind that what you enter must still be in line with the hex-decimal format. Change at least one digit of this value to anything but what it originally was. The right pane double click on “oobetimer”. HKey_Local_MachineSoftwareMicrosoftWindowsNTCurrent VersionWPAEvents in Run regedit (Start>Run>regedit>ok) and go to:.The use of this information though freely available in Microsoft’s tech articles is intended for legal use. It may also be necessary for those who purchased a used system and would like to have their key associated with their OS. This may be necessary for those who purchased VLK’s that were stolen from them and had new licenses granted by MS. To Reactivate go to Start->Run type “c:windowssystem32oobemsoobe.exe /a” without quotes.ĭisclaimer: This tip should not be used for pirated keys! It is intended to change from one legitimate key to another.

Step 3) Double-click OOBETimer when the box comes up change the LAST TWO HEX VALUES to nulls(00 00) Step 2) Navigate to HKEY_LOCAL_MACHINE/Software/Microsoft/WindowsNT/Current Version/WPAEvents OK I have spent the past 10-15 mins looking for a way to deactivate Windows XP Professional…and was successful.

Disable windows xp activation regedit