Serious Input Lag - ON NVIDIA

I just resubscribed to City of Heroes after I17, and I'm having an unusual problem that's making my game unplayable - There seems to be irregular, but serious, input lag for the keyboard, for both moving and typing in game. Sometimes, for a few seconds, it's normal, but always a few seconds after it starts lagging again. With this, I end up having to wait for my messages to finish typing, and I end up running into walls and off buildings unable to stop.


The FPS is high, and in fact the game is smooth and the graphics unbuggy, so I do not get this. I uninstalled my old drivers and installed some brand new ones, no change. I even tried to turn 'Maximum pre-rendered frames' to 0 in the Nvidia control panel like someone recommended, but still no change.

I saw the fix for the ATI problem but I have no idea what to do, as I have a nvidia Geforce 9800. This makes my game totally unplayable so I hope this can be fixed.

Posted a ticket onto this but posting it here as well because my experience with email-based tech support in MMOs in general is that they tend to take weeks before replying, and that would pretty much make me re-quit and have my subscription be wasted money .

This problem can, as far as I know, be caused by Microsoft Security Essentials.
If you have that installed, check that CoH isn't delayed by that.

If not, you might need to give more information like CoH Helper and HiJackThis reports.

I found an odd solution, turning off the service 'ATK Keyboard Service' after clues in other threads that 'keyboard related services' are causing the problem.