Hello, I have two HP DV9700 laptops. Both came with Windows Vista and I wanted to upgrade to Windows 7. So I formatted the primary partition and I installed Windows 7 with the DAZ loader. I also kept the Windows Vista recovery partition incase I wanted to go back. The first laptop is running smoothly after installing Windows 7 but I am having problems with the second. Sometimes it will boot to the desktop but most of the time it hangs after the loading screen but nevers boots to the desktop. I get the black Windows 7 loading screen then the Windows logo disappears leaving with a black screen. I have to do a hard shutdown. When I turn it back on, it gives me a menu to do a "Startup Repair" or "Start Windows Normally". When I do Startup Repair, it finds an unknown problem. It attempts to repair but after awhile it can not. When I am able to boot to the desktop, I sometimes get the blue screen of death stating something about a Physical Memory Dump. I reformatted and reinstalled Windows 7 three times and I get the same result. Has anyone else encountered this issue? Is this problem software related or is it the hard disk coming to an end?