Well, personally, I'd like to kill Bill Gates because of programming problems, but that has nothing to do with MS. That has to do with Bill Gates.
I think that without Microsoft, The computer world would have been screwed. Remember before IBM and Microsoft? Now, I wasn't alive back then, but I know for a fact that there were a LOT more operating systems in use than there are today. Now, if we were still there, with all these games, all this hardware, and all these programs, then we would have to port all our programs, we would have thousands or millions more man-hours being used to write drivers for our hardware.
Long gone are the days of programmers making all their programs. These days we have standards, therefore, without microsoft and their standards, we would be working thousands of times harder to do things.