Changes to specific files and their effects are as follows:
create.cpp - Allows booting past second stage with UDFS media inserted without BSOD
close.cpp - Allows shutdown without hang
dircntrl.cpp - Allows New Hardware Wizard not to hang on initial third phase install
It began to crash with the introduction of the UDFS driver in SVN r74901 == git 3a104c8f20
Fix picked from 0.4.15-dev-3326-g a91f5e8e4d
