I recently bought Studio XPS 1645, i7. By default it has hyper threading enabled and I was not able to find the option to disable it, which is exactly what I want to do. I have the most recent BIOS installed, version A12, released on 06/10/2010.

Am I missing something?

Due to heavy CPU usage on a daily basis this is is very important to me, so all the help would be greatly appreciated.