What is the best software to use to diagnose and check my computer!?

I don't really have any problems with my computer right now but it is running a little slow. I have lots of memory %26 Road Runner so I know thats not the problems. I already have Norton Antivirus/confidential. I really need some kind of software that can check my computer and tell me what I need to do to fix it cause I'm not that great with computers. I do know how to get around on one but as far as finding out what problem could be going on thats out of my reach. I'm really lost please help! Thanks, Michelle

What is the best software to use to diagnose and check my computer!?computer virus

get adaware... it's really good. to clean up your registry, you can use something like ccleaner

ccleaner

http://www.ccleaner.com/download

adaware

http://www.download.com/3000-2144-100459...

oh i think hijack this would be good for you too...

http://www.download.com/3000-8022_4-1078...

What is the best software to use to diagnose and check my computer!?free spyware remover

Symantec/Norton products alone will slow your PC down. I would recommend software such as these:

AVG Free edition ant-virus and anti-spyware

http://free.grisoft.com

Spybot Search %26 Destroy

http://www.safer-networking.org/en/index...

Best of all they are free and work very well.