I've been having this problem for a while now, so I decided to format my hard drive and start with a fresh (and different) copy of XP, and I am still having the same problem.
When I download files off the internet, (Google Earth, Adobe Acrobat, large files such as demos and the like) they download to my desktop and then when I open them they are corrupted. Sometimes this happens with small files, which when I download again sometimes work fine, but larger files are almost always corrupted when I try to open them or install them.
The hard drive I am using is partitioned because it is too big to run as a single drive, and I am on wireless internet. I suspect one of these is the cause. I have tried the hard drive in two configurations, which is C is the large drive and "unallocated" dead-space as the rest, and I have tried creating a partition with the unallocated space, calling this E. I get the problem with both configurations.
Another symptom I'm getting is that when pictures load online they sometimes load halfway down before coming discoloured. I have to delete all the internet files and clear the cashe to get them to load up properly the second time. Sometimes they start to corrupt in different places, and sometimes they don't corrupt at all.
Does anyone know what the hell is wrong with my PC? Because I basically can't download anything off the internet. Much thanks, guys.