Every time I try to download a game installer or any direct download that is larger in size (1+ GB) there is about a 95% chance it becomes corrupt. I have tried all sorts of different online games. Most of the time its either the installer says its corrupt or windows CRC error. I have updated my built in Intel NIC to the latest driver and its still happening. I read somewhere that this is either a driver or NIC issue. They suggest getting a new one or wait for a patch. There are also a lot of options in the driver (never used an intel LAN adapter) so I don't know if I manually set them that might fix something. My marvel adapter on my Asus 3A32-MVP never had such issues. I have also reinstalled windows 7 and still same issues.
My PC specs are in the sig.