If no joy, in IE go to Tools...Internet Options...Advanced tab, Browsing section, uncheck "Enable third-party browser extensions", click Apply, click Okay, reboot. If that solves your problem, then more troubleshooting is needed to find out exactly which program, or Browser Helper Object (BHO) is causing this problem. You don't want to leave it at that, as some BHOs are useful or necessary - like Adobe Acrobat for reading .pdf files or an essential component of Norton AV. Get BHODemon - http://www.definitivesolutions.com/bhodemon.htm - read all about BHOs. Disable all items, and then gradually replace one or two at a time to narrow down the culprit.