To change the product ID
•Log in as the local Administrator
•Click Start > Run > and type in Regedit
•Browse to HKEY_LOCAL_MACHINE\Software\Microsoft\Wi
•In the right pane, right-click OOBETimer, and then click Modify
•Change at least one digit of this value to deactivate Windows
•Click OK and close regedit
•Click Start > Run and type in: "%systemroot%\system32\oobe\msoobe.exe /a"
•Click Yes, I want to telephone a customer service representative to activate Windows, and then click Next
•Click Change Product Key (at the bottom)
•Enter your valid Corporate Product Key
•Press Update and close the window.
•If you are returned to the previous window, click Remind me later
•Restart your computer
Verify the change
•After the workstation restarts, click Start > Run
•Type in: "%systemroot%\system32\oobe\msoobe.exe /a" without the quotes.
•Make sure the dialog box says 'your copy of windows is already activated'
If you performed the above steps incorrectly, or used an invalid key, your system may not be able to boot. Use the F8 key to boot to the last known good configuration and retry with a valid key.
Troubleshooting
If you tried the above steps and nothing happens:
•Make sure you are logged in with the local administrator account, not just an account with Administrator privileges.
•Try replacing the %systemroot% variable with the actual drive letter that your actual directory path, especially when dual booting, or if the system path is on a drive other than C:\
•On a normal Windows XP installation, your systemroot should be C:\windows\ so the command should be C:\Windows\system32\oobe\msoobe.exe /a
•On systems upgraded from Windows NT/2000, the systemroot directory may be C:\Winnt\ so the command should be C:\winnt\system32\oobe\msoobe.exe /a
•Make sure you include a space between .exe and /a in the command:
o Correct - C:\winnt\system32\oobe\msoobe.exe /a
o Incorrect - C:\winnt\system32\oobe\msoobe.exe/a
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