I REALLY need some advice on how to install this fucking .NET 3.5. Lots of programs are starting to use this thing, including some choice BH tools. I already have .NET 2.0 and was making do with that (until I just now uninstalled it). I got so irritated the last time I tried to install .NET 3.5, I gave up after 3 days in hell and reinstalled 2.0. Now I really do need this damn 3.5 thing. I have a Pentium 4, 2.8 Ghz, several G of hard disk left over, Windows XP SP2, so this shouldn't be rocket science. I have gotten two kinds of message so far during failed installations: MSI returned error code 1603. WapUI:  DepCheck indicates Windows Communication Foundation is not installed. and MSI returned error code 1603. WapUI:  DepCheck indicates Microsoft .NET Framework 3.0a is not installed. If there is some kind soul out there, I can provide an verbose MSI log of a failed installation (and the sucker does not even have "return value 3" anywhere on it). I have done everything I can think of. I would be enormously grateful for any help.