How to remove OEM certificate and key and re-import activation OEM certificate in Win7 Ultimate

1. First open the Start menu, type cmd in the search box, then right-click in the program that appears and select “Run as administrator" option;

2, then open In the command prompt window, enter the macro ""slmgr.vbs -upk", this is the uninstall certificate, enter "slmgr.vbs -rearm" to reset the computer's license status.

3, then re-import the relevant OEM certificate and Key.

Basic usage of slmgr command: slmgr.vbs -upkpb61 (help and comment)

4, also run cmd as administrator, import key command (here is Lenovo's Ultimate Example):

slmgr.vbs -ipk 6K2KY-BFH24-PJW6W-9GK29-TMPWP

5, import certificate command:

slmgr.vbs -ilc certificate path < Br>

Other commands and their functions:

slmgr.vbs -dli (display license information)

slmgr.vbs -xpr (default date of current license status)

slmgr.vbs -dlv (showing detailed license information)

slmgr.vbs -ipk 6K2KY-BFH24-PJW6W-9GK29-TMPWP

slmgr.vbs -xpr

slmgr.vbs -ilc lenovo.oemcert.100036.xrm-ms