Weird Process hogging 80% of cpu...?!

[Fredstar]

Yo guys,
Was just doing random stuff imovie/iphoto/Firefox and realised that everything was being delayed and generally goign slower. I then checked Activity Monitor and all the processes under 'my processes' had about 20% and cpu idle was 0%..i then clicked on all processes and i saw VshieldCore Hogging all of the spare CPU i have attached a screenshot of the process in activity monitor.
I would appreciate any help guys because it is making my imac G5 so damn slow!

 

[Scottyk9]

are you running virus software? Virex?
try quitting or forcequit the program, or even restarting your iMac
may need more troubleshooting if it recurrs...

 

[Fredstar]

I have force quit the process and now cpu is back down to 80%, i just thought my imac was being a bit slow but it has been running at 100% for an hour now and is 75 degrees celsius (just a bit hot)
I think it is Virex and i think i am going to delete it now, not only is it a rubbish program (that i will never need) but it also never completes a scan without quitting.