I don't necessarily think you need to buy an entirely new system for what appears to be software issues; the machine you currently have is more than capable of running EQ.
Sounds like the underlying issue here is Windows 8.1 (I too have had issues with this). Perhaps you should consider doing the free upgrade to Windows 10 and completely wiping the machine clean and starting fresh. Reload everything and give EQ another shot.
I've had zero issues with Windows 10 and EQ once I did a fresh install.
[You must be logged in to view images. Log in or Register.]