As many as 500 new computer viruses are let loose every month, and every so often one of them causes a lot of trouble, wiping out files or entire hard disks.
Computers are still highly vulnerable.
Of course, everyone knows that they should not open e-mail attachments, but the latest viruses do not even require you to open an attachment. It is now possible to catch a virus just by looking at a Web page containing malicious Java applets, VBScript, JavaScript or ActiveX controls. They all do useful things on the Internet, and you do not want to keep them out. I am particularly impressed with InoculateIT, which I downloaded recently and tried out. My computer came with Norton AntiVirus installed, and it checks my hard drive every time I turn on my machine.