Please elaborate your query giving details like:
What did you do which led to this error?
PC config and OS?
Post HijackThis log file.
get the latest version of HIJACKTHIS and run it.. and paste the log file *www.spychecker.com/program/hijackthis.html
learn how to use HijackThis here....
*www.thinkdigit.com/forum/viewtopic.php?t=15729