http://bugs.winehq.org/show_bug.cgi?id=25406
--- Comment #2 from dino dyvazar@numericable.fr 2010-12-05 07:21:16 CST --- have followed your post #1, read the howto, tried a new wineprefix, deinstalled/purged wine then make a new clean install with corefonts and fontfix (removed all the asian/african fonts):
always the same result: installation start then a popup says: sorry you need to close as an unattended error occured.
Made a few identic tests with dotnet20/35 but no luck