I have a quad core i7 with windows 7 Enterprise installed. I run a lot of single-thread programs for heavy calculations, so the multithreading is really costing me a lot of time. I can only use half of the cpu I could use without hyperthreading (12-13% instead of 25%). So I want to change this.
Now I've read on multiple fora that you have / have not to reinstall your Windows to change that hyperthreading. So I come to you : How could I approach this best, without losing stability (which I highly need), without unpleasant side effects, and with the least amount of effort. Reinstalling everything will take me a couple of days, so the boss really likes it if I don't have to.