windows explorer muct close error everytime i sign on computer/internet

I have tried znd tried to figure this out adn can't so I
thought I would try this. When I restart the computer I
get an error message saying windows explorer has to close
and then it closes. This happens when I log onto the
internet also. What is causing this? I have looked
everywhere for answers and I'm not one that knows much
about computers so this is rather hard for me. Please if
anyone knows what I'm talking about and something I can
do to fix it please let me know. Thanks so much.