I have a very powerful XPS 600 from Dell and I still love it very much. However, I had only one complaint which is its VT capapility switch in BIOS. CPU has VT capability but BIOS does not offer VT enable switch in BIOS. I have contacted Dell a few times before but it does not seem that it will be supported. So I started looking for a way to get around it.
The following information is what I found online. The feature control Machine Specific Register (MSR) for VT has two bits. The first bit is a lock bit and the second bit is a on and off bit. If the lock bit is locked then you do not really have a choice. However, if the lock bit is clear then you can enable the second bit from OS temporarily.