go in and turn off all the crap that starts with your computer.
services.msc
and
msconfig
(from the start menu, click run and then enter in one of the above)
read up a little, don't just go in and start turnign stuff off.
but there are many extraneous processes and programs that start that are not needed.
also, go into bios and make sure your boot order is correct and that you have it set so it is only booting the devices you have.