Why did I think it'd be a good idea to upgrade to Vista when I replaced two of my computers?  Probably because every Windows upgrade I've ever done (since Win3.1) was never this troublesome!  My main issue?  User Account Control.  In theory it's a great idea (stolen entirely from Unix/Linux.)  The problem is that many, many programs won't run correctly with it enabled!  My favorite game won't even run because Punk Buster boots me off the server.  Haven't found a fix for that yet.  Do anything in the Command Prompt?  Better learn how to open it in Administrative mode and even then you may have problems.  I've finally turned off UAC... we'll see if that makes my life easier.