You will need
  • Computer with operating system Windows XP.
Load Windows in safe mode. To do this, restart the computer if it is already running. During the restart process, press the F8 key repeatedly. In the “advanced options Menu Windows boot, select “Safe mode”. Log on to the administrator. A message will appear that Windows is running in safe mode. Agree with the system by pressing “OK” (otherwise, run system restore).
Click “start” at the command prompt type “regedit“ click “OK”.
Go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WPAEvents. Double-click on the OOBETimer registry entry. Replace opened a series of numbers and letters to "FF D5 71 D6 8B 6A 8D 6F D5 33 93 FD" and click “OK”.
Right-click on the folder WPAEvents and choose “Permissions”. Disable full access to the system by placing a tick in the top right corner, and click “OK”. System notifications about the activation of Windows will be deleted.
To check you can go to the activation wizard, which will tell you that Windows is already activated.