I had a 2nd hard drive in my HP Pavilion which runs XP SP3 so decided to create a partition and then boot from Win 7 build 7057 DVD and install. Windows started and got its startup files from DVD then saw screen with "Windows Starting" followed a few seconds later by blue screen with a STOP message. Tried a couple times, same thing. Then disconnected 2nd hard drive and booted system normally to go back to XP. This also started fine, I logged in, then blue screen with a "registry hive" corruption ! Got everything back by using an image backup from a few days before so only wasted a few hrs. Anyone else had this STOP message when trying a dual install and then had original operating system corrupted ?