Note: This will fail if Microsoft's activation servers are unreachable or if the key is invalid.
Since Microsoft has discontinued the product, you cannot buy a key directly from them. Be extremely cautious when purchasing keys from third-party "discount" websites. Many of these are "grey market" keys (OEM or Volume Licenses) that may be blocked by Microsoft after a few weeks. The safest way to acquire a legal key today is by purchasing old, refurbished hardware that still has the COA sticker attached. Security Risks of Using Windows 7 in 2024 windows 7 32 bit product key
Once you've found your product key, follow these steps to enter it: Note: This will fail if Microsoft's activation servers