http://bugs.winehq.org/show_bug.cgi?id=10309
--- Comment #5 from Dan Kegel dank@kegel.com 2008-11-28 19:11:37 --- Hmm. Are we running the same software? I just tried the current trial, and setup hangs towards the end of the progress bar. If you wait long enough, you see a fatal dialog box saying: "Fehlernummer: 0x80040708 Beschreibung: Unable to create required engine components, check whether you have appropriate privileges to create COM components. (0x80004005) Setup wird jetzt beendet." I get this with or without "winetricks dotnet20 msxml3", on either tax2008Professional_Trial.exe or tax2008Standard_Trial.exe.
If you quit the installer at that point, it leaves behind the inner installer in c:\windows\temp\RARSRX0, which lets you reproduce the problem more easily.
It looks like right before the apparant hang, one sees it starting ISRT.DLL, which opens a pipe, does a little com stuff (which seems to fail?), and then then sits around hangling WM_TIMER messages occasionally until it fails.