Mcafee prompted me to update to the latest version of Firefox, but after it updated I've been completely unable to access Firefox. I get the error message: ---Windows cannot access the specified device, path, or file. You may not have appropriate permissions to access the item.--- I get this message when trying to uninstall it as well. Attempting to to install a new version of Firefox does not do anything. After that I tried to delete the Mozilla from Program Files and then reinstall it, but I'm told that I need permission to perform this action. After trying to take ownership of the folder and files, I received this error message: --- An error occurred while applying security information to: C:\Program Files\Mozilla Firefox\firefox.exe Failed to enumerate objects in the container. Access is denied. ---- How do I get control of Firefox, get rid of it and reinstall it? EDIT. Restarting once didn't seem to make a difference, but for some reason after my second restart, the problem seems to be resolved.