oh good old internet explorer... if you're having that many problems, you may have some spyware or a virus.
First of all, get a better browser here:
http://mozilla.com - download and install it.
Second, download malwarebytes, install and run. it's a good standalone virus scanner.
http://download.cnet.com/Malwarebyte...=dl&tag=button
yes, it's a freebie but watch when you're installing it, it'll ask you to upgrade to pro at some point.