Things like this are an easy way to describe (at least the foolish and experimental) part of your personality, so why not share the most painful moments for your PC with the REST of us!

To start off: I once managed to get not dual, but triple boot succesfull WinXP installations from a SINGLE partition. Next to that, I had Ubuntu LINUX on a second, and DOS 6.22 on an old drive. All of this stitched TOGETHER by GRUB and Boot.iniI don't know if you know JXY or not but he recently tried to triple boot WINDOWS Vista, XP and Mac on his Vista Laptop.....an failed.... Every time he booted into Mac, he had to use the Windows Discs to repair Windows before he could boot into it.
However, he managed to get Vista, XP and Ubuntu on it.

For me, Evilfantasy recently helped me with a Hijackthis log for one of my Experimental laptops. The other day, it stopped working. One time it would freeze on startup, then it would log onto windows but without a working keyboad, then it would freeze at the manufacture logo or say 'no operating system found' or 'no HD'.
I hit the computer several times (breaking the up arrow key) but it's working perfectly now.