Maybe try disabling your antivirus temporarily, and see if you can access it then. If so, there may be a way to add the site as an exception to your antivirus program.
Have you tried using alternate browsers, such as Chrome or Firefox?
Can you post a screenshot of what you see when you try to open mininova? With your browser window active, press Alt+Print Screen, then open Paint and press Ctrl+v to paste the image, then save the image and attach it to a post here.
Also, this probably has nothing to do with your issue, but i would uninstall any of those toolbars you don't actually use, They all slow down your browser, and some toolbars have spyware and upload your browsing history and system information.
good luck!