Check that OS Windows 2003 STD, Exchange 2003 Enterprise, if this is true, then you cannot install enterprise edition of exchange on standard windows edition. You need to buy Enterprise edition of windows too. Arshad setup failed while installing sub-component Base DAV protocol with error > code 0x8000410013, > > Nice one, isn`t it. > Configuration > > DC, GC, roles master server. OS Windows 2003 STD, Exchange 2003 Enterprise > ed. > > HELP PLEASE! > > Or I am dead