Even with a valid key, phone activation may be required as online activation servers for older versions can be inconsistent.
Using Windows 7 is because it no longer receives security updates. Your system will be vulnerable to new viruses, malware, and security threats. Most modern software and hardware are also no longer compatible with this version. Where to Look buy windows 7 licence
Check sites like Newegg or Amazon for leftover physical retail boxes or OEM keys. Even with a valid key, phone activation may
eBay often has listings for "New Old Stock" or used licenses, but verify the seller's reputation to avoid scams. Even with a valid key