Remove Windows Home Premium and install Ultimate version.
Remove Windows Home Premium and install Ultimate version.
Open the Control Panel, navigate to "Get a new version of Windows," input the ultimate key, and observe the outcome. If not suitable, consider a fresh installation.
The OEM key must be cleared from the old system before using it on a new PC.
The product key was applied during the original PC activation. Deactivating now shouldn’t cause issues unless you lose access to the key, which would prevent updates.