Removing the CPU from it's socket is pretty much a "no no" in my books as it doesn't solve anything and only serves to disturb the heat transfer compound between the heatsink and CPU. The CPU's pins are non-corrosive and shouldn't ever give any trouble.
If you copy the error and drop it into a google window, chances are someone will have written about it. I googled your error and it led me to this, which is pretty much what I expected to see.
http://support.microsoft.com/?scid=kb;en-us;315614Your monitor can't handle the refresh rate or the screen resolution your have set probably. Reduce your refresh rate settings and make sure the box that says "Only show modes that your monitor can support" is ticked.
If that doesn't work, then reduce your desktop resolution and the resolution that your applications run in. This could also be a hardware fault, but try the above first.
Get the latest mainboard drivers for that board, which will probably be the via 4 in 1's, lemme check....
http://www.viaarena.com/default.aspx?Pa ... CatID=1070Get the second download (hyperion 4 in 1), as the first hyperion drivers have RAID as well, and some other difference.
I have had personal experience with that mainboard, quite a few years ago. I got rid of it quickly. I had a difficult time getting it to run right at he time, but you would have had a lot more experience with it of course.
Don't waste any money on it.
How is your new PC running Luke?

Mainboard: Asus P5K-Premium, CPU=Intel E6850 @ x8x450fsb 3.6ghz, RAM: 4gb PC8500 Team Dark, Video: NV8800GT, HDD: 2x1Tb Samsung F3 RAID-0 + 1Tb F3, PSU: Antec 550 Basiq, OS: Win7x64, Display: 24&