Replying to Google brings me to wrong site

when i google something, for example giro revolver helmet, then i clink on the link for evo gear. it doesn't bring me to evogear. it brings me to some random page i didn't want. i has been doing this a lot lately for a number of different websites. when i try the link several times it sometimes works. or sometimes i just wait and try it a little later it works. one time it brought me to some random anti virus website and was trying to download something onto my computer.

has this happened to anyone else?