Every system has a feature called DCom which is not at all used in our day today usual PC activities but is "ENABLED" by default in all windows systems. This feature is only used by software professionals for development purposes. Now, the prob is that HACKERS n VIRUS MAKERS have realised this loop in windows systems and almost all the new viruses are capable of exploiting ur system using this loop. But if u r clever enough to use an ANTIVIRUS software u get the warning messages. So the bottom line is to disable the DCom feature n to do it u will have to download a small software called DCom bobulator from grc.com (Doon worry its free n very small) n thts it u will be done.