I have literally screwed up many operating systems, but my "favorite" to do so and most frequently screwed is of course Linux. Although out of stupidity I have also screwed some Windows operating systems. The most broken out of them all has been Windows 2000, most of the mistakes has been installing incorrect drivers, changing the registry, doing crap, etc. Linux is so easy to screw up and so hard to fix (at least for me) but I still love it and use it much more than Windows. My next victime is probably
Macintosh
dan
*More* Windows XP is not actually rock solid, at least not when doing serious changes,. I have made that operating system suffer, I have for now recieved 5 blue screens of death with XP and 3 with Windows 2000. Windows 95/98 it was regularly without doing any changes sometimes, thats why NTFS is top choice in Windows OS's, but Linux has never given me blue screens (probably does screen dont exist in Linux, or?)