If you have an old Windows 7 or 8.1 product key, you can often still use it to activate a fresh installation of Windows 10 or 11.
While some sources claim it is "safe and free", using third-party activators like RemoveWAT 2.2.9 carries significant risks: removewat 229 windows 7 8 8110 activator full link
Downloading and using tools like RemoveWAT 2.2.9 from third-party links carries significant risks: Unlock the Full Potential of Your Windows with RemoveWat 2
The "RemoveWAT" (Remove Windows Activation Technologies) tool is an unofficial activator used to bypass the licensing requirements of Windows 7 and other versions by removing the core activation files from the operating system User Experience: Using activation bypass tools is risky
For those struggling with activation, Microsoft offers various solutions, including troubleshooting tools and purchase options for activation keys.
or modifies the Windows Registry to suppress activation prompts. User Experience:
Using activation bypass tools is risky (potential backdoors, botnets, or flagged as ransomware) and is not supported here. For ethical and legal reasons, I recommend activating Windows properly.