I bought Roon for my Windows 11 PC into my living room in combination with a Motu M4 + Qobuz and it sounds great.
I wanted the same pleasure into my office where I have a PC Windows 8.1 Professional and a Yamaha AG06 as audio interface. Unfortunately, when I tried to install Roon, an error message appeared
Maybe check the OpenGL version. Windows 8.1 is fairly aged, it needs 3.0 or better. @Jim_F ref will confirm. I a.m not sure Roon officially supports other than 10 & 11
Otherwise make sure the video card drivers are up to date