W32 Supernova worm

I could not figure out what this Supernova thing was that keeps popping up on my computer. I went to the search engine and typed in W32 Supernova to discover its some kind of worm that I can't get rid of! Secondly I have the same WJView Error message as another thread discussed. It says: Unable to locate system/class: java/lang/object. I have had this error message for some time. How do I get rid of this too? I am on Windows XP. My last question would be which is a good and inexpensive antivirus software that I can purchase? Maybe that will eliminate some of this in the future. Kindly help Thanks.

 

Please go to the link below and downloadHiJackThis by Merijn Bellekom:

***NOTE***Do not FIX anything without a log analyzer's guidance. MOST of what's listed is necessary for your computer to operate normally.

http://www.majorgeeks.com/download3155.html


Alternate download links:

http://www.spychecker.com/program/hijackthis.html

HiJackThis download link


Under "Official Downloads" HiJackThis. It's the 2nd one down.

Download and unzip to a permanent folder of your own creation.

Open HiJackThis. Click "Scan". Then, in the lower left corner, click "Save Log".

Save it to your permanent HiJackThis folder (or floppy disk if necessary).

The log will open in Notepad. Click "Edit" then "Select All".

Copy and paste the log back to this thread.