Lenovo windows7 Basic Home Edition cannot be upgraded to windows7 Ultimate Edition at once. Before upgrading to windows7 Ultimate, you need to upgrade to windows7 Premium Home Edition or windows7 Professional Edition.

Lenovo windows7 upgrade method: right-click the computer-Properties-System Protection-Create a restore point, open the system to protect the local disk: System C. Click "Learn more about windows7 features"-enter the following upgrade key-click Accept-wait for the upgrade progress bar to appear for ten minutes, and let the computer upgrade automatically.

If you want to upgrade to the flagship version after the upgrade is successful, click "Learn more about windows7 features"-enter the following upgrade key-click Accept-and wait for ten minutes for the upgrade progress bar to appear, so that the computer can be upgraded automatically.

1, OEM key of Lenovo Windows 7 Home Premium Edition: 27GBM-Y4QQC-JKHXW-D9W83-FJQKD.

2. Lenovo Windows 7 Professional OEM key: 237XB-GDJ7B-MV8MH-98QJM-24367.

3. Lenovo Windows 7 Ultimate OEM Key: 6K2KY-BFH24-PJW6W-9GK29-TMPWP