I would appreciate any help with this problem. I am suddenly having difficulty with Firefox. When I try to type into any open field on an open screen, there is a significant lag between the pressing of the keys and the characters appearing on screen. This began occurring two days ago. I have not added any add ons to Firefox itself. I did download a program for reading magazines called Zinio. Other programs, including Explorer, are working fine. I have downloaded a new copy of Firefox as well as tried refreshing the program, and neither helped. Could Zinio be causing a problem in Firefox? Is there anything else that could be causing this problem? I am running Windows 7 on a Dell that is less than two years old.