The safest method is always using a legitimate product key, which can still be used to activate Windows 7 if you have one.
You're looking for information on a software feature, specifically: Removewat 2.2.9 -Windows 7- 8- 8.1- Activator Full Free
Often, old laptops have a Windows 7 or 8 sticker on the bottom or under the battery. That key can still be used to activate the OS. The safest method is always using a legitimate
By removing the underlying activation architecture, it eliminates the "This copy of Windows is not genuine" watermarks and popup notifications. Removewat 2.2.9 -Windows 7- 8- 8.1- Activator Full Free