"C:\%Windows%\Microsoft.NET\Microsoft:NET\Framework\v1.0.3705\" I think should be "C:\%Windows%\Microsoft.NET\Framework\v1.0.3705\" - "Microsoft:NET" is invalid in a path. On a Win 2000 system, that will expand to C:\WinNT\Microsoft.NET\Framework\v1.0.3705\ (Assuming windows is installed on C drive and uses the default 'winnt' directory)

lpt$vpn.867: According to http://security.uwo.ca/antivirus/patches.html this is a pattern file for detection|removal of WORM_MSBLAST.A & VARIANTS

The url "http://kline.dal.net/exploits/akills.htm#os" Does not mention any particular trojan. There are many many such worms out there.

I suggest you download a couple of the trojan removers listed in this post, update them and scan. The shareware versions will mostly give you thirty days of full usage to try them out.