Give Linux a try. I suggest you stroll over to
https://ubuntu.com/tutorials/install...top#1-overview, make a bootable USB and select "Try Ubuntu" so you do not touch your existing system.
There's a similar setup over at
https://fedoraproject.org/workstation/download/ if you like a slightly more stable but less featured approach.
There's a progression from trying Linux recreationally on a USB image, installing it as a dual boot setup alongside Windows, to ditching Windows altogether. It's like drugs... I think... I sacked Windows completely about seven years ago. Seems to me that they finished the project at Windows XP and since then have been driven (ar)solely by their marketing department.
SH3 and associated mods, tools etc run fine under Linux using the Wine application to provide all the interfaces expected from Windows. It's a bit of a pain to understand at first but it is long term stable and you are not forced to buy new hardware every few years.