http://bugs.winehq.org/show_bug.cgi?id=11719
--- Comment #4 from Dan Kegel dank@kegel.com 2008-12-25 17:22:27 --- Looks like FDICopy fails while trying to use CreateFile to open system32/msxml4.dll for writing; it fails because that file is already open. The installer does some COM call that references a COM object defined in msxml4.dll... and that dll is never unloaded, so msxml4.dll is never closed.
(The COM call comes right about the time the installer opens qbregistration.dat, for those pawing through logs.)
I don't know who's at fault here. It kinda looks like the installer installs msxml4 twice, too, or there'd be nothing for that COM call to reference.