: You can find physical, sealed "New Old Stock" copies (DVDs with licenses) on platforms like eBay or Amazon .
: Be cautious of ultra-cheap "product key only" listings. Microsoft warns that these are often stolen, pirated, or volume licenses not intended for private use. How to Download the Official ISO buy windows 8 download
Microsoft officially stopped selling Windows 8.1 years ago, and they do not offer an Extended Security Update (ESU) program for it. To get a legal product key now, you must look to the secondary market: : You can find physical, sealed "New Old
: Sites like Mr Key Shop and Digital License Shop still list Windows 8.1 Pro retail and OEM keys. These typically offer instant digital delivery via email. How to Download the Official ISO Microsoft officially
Even if you buy a key from a third party, you should always download the operating system from a verified source to avoid malware. Betting the Company on Windows 8 - Coding Horror