Not sure about this, just going by what I've seen on these forums in the past... But SP1 is essential to enable USB2, is it not? Correct me if I'm wrong, anyone, lol. Also, I have installed SP1 on several lappies and computers and NEVER had any problem... From what I've heard, when people encounter problems with SP1, it's usually from something they did wrong, lol, but being that people on here have had trouble, I hardly think that is accurate... In fact, I'm pretty darn sure it isn't :-) But, I would recommend trying it unless you have some major problem in doing so.