AntiVirus Software.....Serious Issue..Please tell me

I've always enjoyed Norton Antivirus Corporate. You pay for the software and then never have to subscribe again and can use it on as many computers as you want. It's more expensive but I think it's worth it. My new laptop with Vista just came with PC-cillin Internet Security and I'm happy with it so far but it's hard to get it to do all of the updates once you install it. I've had my computer for 3 weeks and everytime I reboot it's still trying to catch up. It's a pain because you have to reboot every time. Also Spybot Search and Destroy is an awesome program. I use it once a week but it is not an antivirus program. It only catches malware, spyware and adware but you should always use it along side of your antivirus.

I use Spybot Search and Destroy and Avant Anti-virus...both of which are free and run great! They don't slow my computer down and I've never had any problems with them! Good Luck!