If you must have an activated, fully functional Windows 8.1 Pro (for legacy industrial software, etc.), purchase a legitimate key from an authorized reseller. Avoid eBay or sketchy forums.
If you realize you have already downloaded and run a file named "kmspico 81 pro top," follow these steps immediately: kmspico 81 pro top
KMSpico is an unauthorized tool that emulates technology. If you must have an activated, fully functional Windows 8