I have installed .net framework 3.5 SP1 onto a Server 2008 machine and have tried to run the SCCM setup. I get an error message right away saying that .net framework 3.5 sp1 failed to install and that SCCM needs .net framework 3.5 sp1 to run. Whilst .net framework did fail to install the first time, it installed sucessfully the second time. Is there anything I can do to get SCCM to recognise .net framework 3.5 SP1 is actually installed?

Have you tried restarting the server?Regards, Madan