The Windows Installer Service could not be accessed. This can occur if
the Windows Installer is not correctly installed.
Or, *there is not enough diskspace*.
The 0x643 is a generic error.
Fatal error during installation.
Visual Studio and .NET Log Collection Utility
Suggest you use the above utility to gather more specific errors and
then search or post on the MSDN Forums for .NET Framework Setup and
Visual Studio Setup and Installation -
This thread, from the VS Setup/Installation forum, recommends freeing
MowGreen [MVP 2003-2008]
> We have a SBS 2003 server that has been getting updates just fine for several
> years, but now (for about two weeks) all updates are failing with error code
> 0x641. The two updates it is trying to automatically install are KB948110
> and .NET Framework 2.0 Service Pack 1 (KB110806).
> Error code 0x641 even happens if I unselect the two above updates, and try
> to uninstall one non-critical update (MSXML SP 1 KB934268).
> I do not know if this is related, but this SBS 2003 server has ISA 2004 and
> all Internet traffic comes through that.
> There is also another server at this site (Windows Server 2003 Standard)
> that gets a slightly different error (Error Code 0x643) when it tries to load
> an update. The only update it is trying to load is "Visual Studio 2005
> Service Pack 1". It's Internet connection is also through the ISA 2004
> Server running on the SBS server.
> Any help would be appreciated.