HIS 5830 graphics card arrives, and still doesn't work!

So the HIS 5830 graphics card was delivered on Tuesday.  The card is a bit longer than the malfunctioning XFX 4870 card it is replacing, but I was able to get it in place by moving cables out of the way as much as possible and wiggling it in to place.  No issues on power-up, but when I went to install the drivers they did the same thing as the 4870 was doing.  Each time I tried, the driver installation would fail.  Obviously there was nothing wrong with the old card, so I went about trying to track down the true issue.  The possibilities I came up with (besides the video card which seems NOT to be the problem) were the PCIe slot, the power supply and the hard drive.  The hard drive would be the easiest thing to check out, so I ran the disk check included with Windows 7.  The process is simple, click on Start then select Computer and right click on the drive in question.  Select properties and then go in to the tools tab and click the check disk button.  I checked the boxes to automatically fix detected errors and hit OK.  The disk can't be checked while it's in use, so the system set up the scan for the next time the computer is started.  This turned out to be the problem (which is good because I didn't ant to have to replace the power supply or mainboard).  The scan took about 7 hours to complete, and there were a LOT of files with bad clusters which were fixed.  After all was said and done (at about 2am), I was able to boot up and install the latest graphics drivers from the ATI website.  SUCCESS!  Still, there are a few issues.  I don't know why the files got corrupted, so I don't trust the HDD that much anymore.  I've backed up all my data and will be purchasing a new hard drive this weekend.  I'm thinking of just using Synctoy from Microsoft to sync all of my personal folders to another computer on the network which is backed up with Carbonite.  Then I'll just keep running my computer as it is until the drive fails or I build another box, which I'm planning on doing early next year anyway.  When I do, I'll probably get another 5830 card to run in crossfire mode.

The video card I purchased came with a free download of Modern Warfare 2 from Steam.  It took about 12 hours for the download to complete, but the game is working great with the 5830 card!  With all video setting as high as they can go I'm getting around 75 fps frame rates.  It could probably go higher if my monitor had a faster refresh rate.