Jasoman

When does it freeze? When waking from sleep or while gaming? or both?

I would say to buy a laptop with a professional GPU and use the CUDA cores of the dedicated graphic card (not the CPU) ... if you need CPU (depending on technology you want to use in your 3d modeling) try to get an I7 ( 4xxx/EE or 6xxx) if you need details you can use ark.intel.com, try to stay away from anything AMD (is too hot for mobile) and Atom/"low power" U cpu-us from Intel 

http://windows.microsoft.com/en-us/windows/create-format-hard-disk-partition#create-format-hard-disk-partition=windows-7

You could just look through the process list to see if anything is left behind. You could run Rkill before playing CSGO to make sure or just run if before doing a virus scan from Malware-bytes/JRT. I would also run adwarecleaner.