I put my first system together today, and once everything was connected I power it on and booted it up. I got to the BIOS without problems. The HDD I have in there is from an previous computer and I intended to install win7 on it, formatting the drive. When I booted, it got to the "Windows has failed to start" page. This was unsurprising considering the the OS version on the original drive. I then sorted all my cabling out and went to a friends house who had a win7 disk. However, when I turned the machine on, it got past the POST screen then the screen is covered in white fuzzy lines, and the boot process freezes. This occurs while trying to boot off the DVD drive or the HDD. I have no idea what's wrong, considering it appeared to work the first time.