Ok, you're gonna need an ARrrgh-matey copy of Win 7..
Then you're going to put it in high-performance mode in power options, Leave CPU at 100% always
Disable anything that says power saving in Bios.
Run the app called Timer Resolution all the time, just keep it in the background.
Run UnparkCPU app..
Keep your windows 7 partition in a 50GB section, and so when you need to defragment, you don't have to defragment the whole 500GB
Disable tablet component, Disable windows gadget platform, Disable Windows firewall, You can run Avast, but only if you're going to Naughty websites.. otherwise it's not necessary..
For media players to play movies that are from arrrghmatey publications, make sure to use one that supports DXVA, because otherwise the cpu won't playback 1080p//
kicad and stuff, all that will work fine..
I'd still go with WinXP, buhhh lots of people don't want to deal with the manual updating, so there's that..