I am running Windows 7. This is happening with both Firefox and Internet Explorer. Explorer immediately stops working upon launch and can only be closed through a forced shutdown of laptop. Firefox hangs intermittently while browsing and crashes while performing specific tasks such as when attempting to attach files to gmail message--this happens as soon as I click to add attachment....window opens where files should be listed but files never appear and window either has message that it has "stopped working" or "not responding" not sure which. I would appreciate any help finding a solution to these issues.