Certain types of downloads seem to fail on me. For example, I downloaded the file for the update, then when I go to install the files I get a 7-zip: Data Error. Also, when I try to download an OS update for my iPod Touch on iTunes, the download will seem to complete but then it will say the data was corrupted during download. I think I had this same problem downloading an OS update for my Galaxy Tab through Kies too. I can circumvent the problem by finding an alternate download method, and I am no network specialist but this leads me to believe that all of these download methods probably use a common protocol that my computer isn't handling correctly (wild guess).
I'm using Windows 7 Pro if that helps. I'm probably gonna end up trying to sell this desktop and build a new one with ATI instead of Nvidia, but if I sell it to friends or family I definitely want to try and get rid of the BSOD problems first.