Unlike on Windows 2003 it is not possible to Reinstall /Rebuild COM+ on Windows 2008 without effectively reinstalling the operating system. Before undertaking such an extreme step the question of why COM+ needs to be installed should be addressed. ...

In the design change between Windows 2003 and Windows 2008, MSDTC running on a cluster should now be able to take advantage of all available MSDTC authentication option when servers are running on the same domain as their MSDTC client servers. There...