Back in August, 2013 I purchased a Dell computer (OptiPlex 9010 Minitower) which has been working very well. It has Windows 7 installed. Recently I got a notification that Windows 7 will reach End of Life (i.e. Microsoft will no longer support it) soon. So I updated it to Windows 10, following the tutorial below. The process is quite smooth.
https://www.zdnet.com/article/heres-how-you-can-still-get-a-free-windows-10-upgrade/
