i havnt had any problems with bd at all
but i think i had a single ctd, but i was drunk most of the time... so
iv installed on win2k and xp, on 4 different systems, running ati and nvidia cards
it all worked perfectly
the one think they have in common is there clean system, there all firewalled, they have update virus scanners, and there behind a router
i keep the network clean and the OS's clean, and dont install cheap software, or anything 'free' with spyware
i think that the bloke that said that your windows install might be causing the problem is corret,
try running a virus and adware check, or better yet, just reformat and refresh your system
the old' reformating should be a last resort is [nocando], try bd after a fresh format :P
