Dell Microsoft Windows XP Home Edition "baloon" Questions

norten says i am virus free, but i keep having messages saying click this baloon to fix worm,then you have a black door trojanect....... you have spyware . get spybot and adaware and get rid of it.

...a backdoor trojan that allows the remote attacher to perform various malicious actions. Click this baloon to download malware removal software. I have downloaded avg anti spyware already and have ...

I keep getting a message on my computer that "virtual is low, click balloon to repair" I click the baloon and it is ok, What does this mean? For that first remove all temp files from computer. Press ...