: Look for a Certificate of Authenticity (COA) sticker on the bottom of your laptop or the back of your desktop tower. It contains a 25-character product key.
: Modern processors (Intel 7th Gen/AMD Ryzen and newer) do not officially support Windows 7 and may require complex workarounds to install drivers. how to buy windows 7 license
: This usually applies only to OEM versions of Pro software pre-installed on business-class computers (like Dell Latitudes or HP EliteBooks). 4. Beware of "Cheap" Digital Keys : Look for a Certificate of Authenticity (COA)