Reply to Questions regarding audio account set up in Windows 7

Hi guys, I took a couple of years off of deejaying when my son was born but it is itching it's way back into my life
So i am now trying to set up my new HP pavilion i7 machine for traktor pro 2 and ableton to run with my mpd24 and hercules RMX.

The thing is....
I used to run all this first on a windows xp (which worked great) and later on a vista machine but i got so tired of messing with vista (drop outs and spikes) that i stopped completely. So now i have this new machine and i want to set it up good and propper so i don't look like a tool performing with driop outs and such, so i figured i need to make a seperate account for my audio.
I already got the tutorial from the NI site to make my laptop audio friendly but
Things i'd like to know now are:

is it possible to make a seperate (sub) account that has no windows updates, internet or unneccesary programs running, and a lot of the laps hardware turned of while still maintaining full functionality in my normal account? i have a network set up at home for streaming and such and i don't want to be manually activating or deactivating stuff constantly.
I know i would be better of with a seperate laptop but finances atm make this impossible
I just figured that maybe if i made seperate accounts i could just have my audio account start up with traktor running and no hassle?

thanks in advance for your time and thoughts on this
If there is already a thread covering this please just direct me to it and close this one
thank you