"The last virus that bit was a Word Macro virus on a floppy from my then boss,"
Interestingly the company I work for actually puts, what is basically, a browser hijacker on our laptops. I can get rid of it, but every time we log on to the company's network it gets added back on to the laptop. What does it do? It makes our home page the companies main trashy web site.
We're limited to what we can install on the laptops so the best way to get around it is with Google Chrome on a USB drive. But that's a nuisance so I just gave up.