>>33
Yes, they can have you put to jail once the appropriate laws are in place. Tampering, even trying to tamper with the MS Vista Premium Content Protection will get you in jail now. The laws to get you in jail are in place already, the only thing is they can not (yet) force you to use TCPA. But they have made already attempts, which luckily failed. And they is not only Microsoft.
First if IBM would not be around and they release their specs for their arch, you would this type of computer. If Bill would have not been around we would probably run OS/2 or Unix. Probably also more GNU/Linux, but that came quite late. There is a good chance that Mac or SGI would be the leading company in computers. Bill Gates actually jumped the bandwagon, the only thing MS did right was their extensive computing.
I doubt that Microsoft has such a strong influence on history. I would estimate at max 5 years delay without them and maybe less private use. (Less morons in the internet, yay.) But the landscape would definitely be more diverse. (Or only IBM, not better really.)
You must also say that Microsoft has a negative effect on software developers, people (users and devs) get used to mediocre software, that is definitely not the way to go. Even though mediocre software is cheaper in the beginning, the overall costs, including those of the user, are significantly bigger. I do not think MS is a bliss for humanity.