: Ensure you are using a valid retail or OEM product key. You can update this by going to Control Panel > System > Change Product Key .
If system is unstable afterwards
Chew-WGA v0.9 is a software utility designed to bypass the Windows Genuine Advantage (WGA) chew wga 09 the windows 7 patchexe
Bypassing WGA is a violation of Microsoft's software license terms and can have legal consequences depending on local jurisdiction. Typical Usage Process : Ensure you are using a valid retail or OEM product key