vista guardian tells me I have viruses Norton can't find them

My old antivirus software (from MacAfee which was great) expired at the end of 2009 I didn't renew it immediately and apparently my computer is full of viruses. I installed Norton today and performed several full system scans, ran liveupdate as "help" suggested restarted my computer countless times, scanned the files vista guardian says is infected with Trojans and found nothing more than tracking cookies with Norton. What the hell is going on?? I'm almost at the stage of throwing my computer against the wall!

Is there any way of getting rid of vista guardian or turning it off seeing as I am now "protected" by Norton? Should I just get another antivirus product that actually works?

 

I actually feel a bit better after my little rant I hope someone can help me,

 

Sarah