I downloaded Ultimate Edition 3.5 64 bit from Sourceforge. It didn't pass the MD5 checksum test. I tried to download it again but it would only download 0 or just over zero bit size filesizes and then say it is done. In case it was the browser, I used Mozilla Firefox, Google Chrome and Internet Explorer. None of these work. Is there a timelimit at Sourceforge for redownloads? I've never noticed this behavior before. I was able to get a bootable disk but the install kicks out with an error. I am working on a Windows 7 laptop. It's a Samsung RF510 laptop. The fact that it booted off the DVD implies that the drivers are there, at least that is my surmise. After the failed install from the booted up DVD image, it appeared that my hard drives were unaltered.