Recover Lost CD Key


If you lose the CD case for the NT install, you also lose the CD Key unless
you’ve written it down somewhere. This is a problem when you need to reinstall.


  • The CD Key is digits 6 through 15 of HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
    NT\CurrentVersion\ProductId
    .
  • Using Windows NT Diagnostics, the CD Key is digits 6 through 15 on the
    fourth line of information on the Version tab.
[hint not correct for
Windows2000]

Leave a Comment

Your email address will not be published.

Scroll to Top