okey the name of the virus was wrong there its 'IST svc' I came across it after I run ad aware software...I have Macfee as anti virus software n my OS is win 98. The error message I get is : Windows cannot delete this file, the file may be write protected or currently in use by windows....ok I checked out in virus logfile of ad aware it says nothing about its removal but says it gives pop ups creating erro on internet explorer. Okey guys thats the details I can give..please feel free to ask if u have further question....Thanks