I have a pc running windows 8.1 pro and I want to upgrade to windows 10, but when I use "Windows 10 Upgrade Assistant" it says that my PC will not run windows 10. My CPU is OK, my Memory is OK, my Disk Space is OK, but the Operating System is not OK. It says "Contact your system administrator to upgrade Windows Server or Enterprise editions".
Like the message said, upgrade wont install on enterprise or server editions of Windows. Most likely you have enterprise (academic) version of Windows. You can get Windows 10 version from your company or university and do manual upgrade.
Edit: if you're not sure about your version, run Settings / system and click about (similar in Windows 8.1):
Computer Type: PC/Desktop System Manufacturer/Model Number: home built OS: Windows 10 (Pro and Insider Pro) CPU: Intel i3-10100 Motherboard: ASUS Prime B460M Memory: 16 GB, Crucial Graphics Card: Intel on chip Sound Card: Realtek onboard Monitor(s) Displays: Dual ASUS+LG Screen Resolution: 1920 x 1080 x 2 Keyboard: Cherry, same for the last 20 years Mouse: Logitech M500 PSU: No name, 80 plus, 500 W Case: Mini Tower Cooling: Silent Hard Drives: Kingston A2000 NVMe, 500 GB Internet Speed: 100/20 Browser: FF, Edge, Vivaldi Antivirus: WD + MBAE, SpywareBlaster, hosts file Other Info: Eaton UPS
ASUS Vivobook Flip 14, Ryzen 7 4700U, 512 SSD NVMe, 8 GB DDr4
Computer Type: PC/Desktop System Manufacturer/Model Number: home built / frankenstein Junior OS: Windows Insider, Fast ring CPU: AMD FX6300 Motherboard: gigabyte 970A UD3 Memory: 8 GB Corsair DDR3 Graphics Card: nvidia GT710 Sound Card: Realtek on board Monitor(s) Displays: same as 1st Screen Resolution: 1680 x 1050 Keyboard: Cherry Mouse: Logitech PSU: Tecnoware 520W Case: Ugly one Cooling: 2 x 120 mm Hard Drives: Crucial BX100 240 GB, I TB spinner Seagate Internet Speed: 100/20 Browser: FF, Edge, Vivaldi Antivirus: Windows Defender, Protected folders on, PUA on