It was a DELL computer given to me for free from about 2008, an Intel Core 2 Duo (not sure which one), 8GB of RAM, upgraded to Windows 7 myself and added an SSD. What are you running?
I should add that the emulation runs great, just the front end that is slow. I might give GameEx a try, hadn't looked at it for a while and it looks like they've got an arcade specific version now that looks quite similar to HyperSpin and can even use the same themed videos.