If you have installed SP3 onto your new HP, and are now experiencing a blue screen upon rebooting, you need to boot into safe mode by continuously hitting the F8 key upon starting your computer.  Then, click on the start menu, select “Run.”  Next, type in regedit and hit enter.  Look for this key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Intelppm\Start

Upon doing this, you need to change the hex value for “Start” from 1 to 4.

Complete these steps, restart, and you should be able to get into your computer with no more blue screen.