The error I encountered by myself was when I was trying to open a new webpage on Internet Explorer. When I tried to open a new webpage, there was a pop-up saying the toolbar has stopped.
To fix it, I disabled the add-on by accessing Tools in the Main menu, then Manage Addons and disabled the one with Toolbar H from the list where all the add-ons were installed. Then I restarted the browser and opened a new webpage and the error was gone and I could browse without interruptions.
If you actually use the toolbar, then you need to perform a fresh installation of your toolbar and check if the error still persists.