Why does my computer shut down and then restart?

Question

This only happens on yahoo. I click on a link that or word that takes you to another page, my computer will shut down and restart. In yahoo personals every time I click the next button, it does this. But only in anything that has to do with yahoo.

Answer 1

i'm not an expert, but you may have a virus or something like that, if you can, run a full system scan to make sure no one is stealing personal info (this happened to me once)

Answer 2

a virus could cause this...get Nortin