Yes, macrovision exists, but it isn't used on tv broadcasts (yet)...just on other VHS tapes and DVDs. Recording a TV program is just, tape in, record...on in the case of DVRs, record
and contrary to the wiki article, i've never had a problem recording a program through a cable box, regardless of using a VCR, Tivo, or PC. And is even through several different cable companies. never tried through satellite. though friends with satellite haven't had any problems with recording.
A badly run network is a badly run network regardless of what OS you use, if you have to login via a server (as opposed to logging into a machine then connecting to a server to access files) on a crappy network it will be slow and unusable end of story, unfortunately my school doesn't actually seem to do any maintenance on its network so if you want to use a computer you normally have to look for one that is actually complete with keyboard, mouse and ethernet cable and then sit and hope the networks working.