Presario M2000z CTO: Very long boot (1hr) after installing windows SP2

Hello, I recently installed a fresh copy of Windows (SP1) on my Presario M2000z CTO laptop. Everything seemed to be working fine so I installed all the drivers that were listed on the driver download page for my laptop model on the HP site. Still everything was working normally. However, I installed SP2 from microsoft.com and now my computer takes a great amount of time to boot (sometimes over an hour). I was instructed to update the BOIS by a HP technician but it did nothing. Any suggestions?
double post-sorry