Hey all, i hope someone can shed a little light on this.

Suddenly started happening.. I've formatted my harddrive and reinstalled windows and the problem persists. If i download and run a file it works fine. However, If i move it anywhere on my pc and run it it's corrupted.
The same happens with installers for games etc. Even when running from CD/DVD they all stop and report corruption of the installer.

What on earth could be causing this? I've scanned everything before and after reinstalling/formatting everything and not found a thing. Is it possibly some messed up RAM or smething that's doing this?

ANy ideas?

Heya Ronin Welcome to PCHF

If you can open your case and find out the manufacturer of your hard drive, you can go to their website and download a free hard drive diagnostics utility. You can use it to create a bootable disk to test the integrity of your hard drive. Just create the bootable disk, boot to it, and run the diagnostics.

That will tell you if your hard drive is failing. If the mechanics pass, then try running chkdsk /r /f. Click start, run, type CMD, then in the command prompt type chkdsk /r /f, hit "y" when it asks, then reboot your computer. It should run a chkdsk and fix any issues, it will take about an hour.

If the problem still persists, you can try running Memtest86. That is also a free diagnostic tool that checks memory. You can click my link to go to their website. You will also create a bootable disk with it and boot to it to run it. Let it for for at least one full pass. If you see any red come up, then your memory is bad. You will have to test each stick of memory with Memtest by itself to see which stick is the bad one(s).

It doesn't seem like it should be a memory problem though. Usually file corruptions are a result of bad sectors on your hard drive or mechanics problems on the hard drive.

If all passes and the problem still persists, I would run Darik's Boot and Nuke to do a thorough wipe of the hard drive......very thorough lol. Since you have already formatted, I'm assuming you are ok with losing your data again. Just let Darik's Boot and Nuke run through at least one full pass...it takes a while. That program will totally and thoroughly format the drive, wipe the partitions, master boot record, etc. It will also do what chkdsk does basically, but much more effectively. Once it's done, reinstall Windows again and give that a shot.

If it STILL happens...that is a tough problem to figure out. I would imagine a problem on the motherboard. That would require a lot of testing to narrow down after that.

Let's go from there!