why did I install Windows 10?

Blasted thing decided to lose my account, i tried all ways and the only way I could log in was to use other user and type my name in.
Never had that on any other version of Windows.
Decided to give up in the end and use a image I had. Good job I back up often.

Because of its really nice best operating system and in windows 10 you can get by default best free anti-virus also.Windows 10 have the store also you can download apps from the store directly.In my opinion, you have to download windows 10 and start to enjoying using Windows 10 Operating System.