Windows 7 install error 0x80070017 - How to fix?

I am trying to install the Windows 7 Enterprise Trial for x64. I downloaded the ISO file from microsoft.com and burned image to DVD. First DVD I burned, it got to the “Expanding Windows File….0%” and stayed there for a long time before the “Windows cannot install required files. Files may be corrupt or missing…” Error Code 0×80070017 came up. Searched around the net and found out that maybe my write speed was too high or ISO was corrupt. Downloaded new ISO file, and burned a second disc at slowest write speed. Testing this new disc, I did not get the error and it installed fine. I wiped it and replaced with Ubuntu 11.04 LTS. Now I want to get Windows 7 back installed and I am getting the same Error Code. I doubt it is a hardware, DVD, or ISO issue since it worked before….so what on earth could be the problem? I have been looking for an answer for hours and cannot find anything. Please help!

Oh, I reformatted the whole HD and tried partitioning in different sizes and still no difference…