I'm attempting to upgrade from 32-bit Vista Home Premium to Windows 7. I used the 32-bit disk to avoid having to do a full clean install, but every time (4 tries so far) that I've done it, it will get to the last portion of the upgrade where it transfers over all the old documents and programs. At that point the screen turns into a weird pattern of diagonal lines. Sometimes they are white and blue lines 1 inch thick, other times they are really thin lines. Any thoughts on what may be causing this? The machine is fairly new and high-end for a Vista machine, so the graphics card should be perfectly. I've run the Upgrade Advisor and it only mentions a couple software issues such as iTunes which I can't see as prohibiting the upgrade. Any help is greatly appreciated.