Thanks Agent_steal. Tried trend micro online scan. It found one worm, but before i could read it cleaned and continued to scan. I still do not know it found kbddrv32.exe etc.,

In fact I manually removed some of the startup executables using msconfig>startup (win98)and also removed the files which was pointed to execute from the directories itself.

Now I have another problem. In Msconfig>startup, in the list i still could find unchecked entries which is not used any longer. Is there some kind of utility to remove these unwanted entries (like run= c:\windows\system\vidcntl.exe)

Thanks in advance