problem downloading msn please help

From: Teresa (Teresa_at_discussions.microsoft.com)
Date: 01/24/05 

Date: Mon, 24 Jan 2005 06:35:06 -0800

i am trying to download msn it says.............an error has occurred during
the intstallation of assembly microsoft windows
networking,rtcdll,type=win32,version=5.2.2.1,pubickeytoken=6595b64144ccf,processorArchitecture=x86.
Please refer to help and suppot for more information hresult:0x80070002.
now the thing is i had it on my computer but yesterday morning came on the
computer and it no longer to be found on here. Looked under add and remove
programs and its not in the list anymore. Can some one please help me with
this. Then it also says msn messenger setup has failed with error code 1603