When I truned on my computer this moring and ran a Live-update my 'Norton 2009 Virus Definitions X64' required reloading for a total of 76 megs. I didn't think to much about it. When I restarted my computer agin this afternoon, it required the same 76 meg update. I then ran a complete system scan and had on visible problems on my computer. Is there something else I need to try?