My computer began freezing when I close the internet. Mouse moves but when I click on icon nothing happens. I can use ctrl,alt,del to bring up logon/off window. When I log off and back on I can regain use of all programs.I am running Windows 7,and using IE9,with 6 gig ram. I t seems to have slowly began when I uninstalled Firefox about 2 weeks ago. It was too unstable. This issue was happening just a few times but has now progressed to each time I leave the internet. Any help will be appreciated.