OK thanks Patrick, I will keep an eye on it and post again if I get further info.

No problem like this has been reported before.

Dexpot doesn't intercept any key presses. The MouseEvents plugin does have a keyboard hook, but it always passes on all events. So unless you can really exclude everything else as the cause of the problem, it would seem unlikely that there is a connection...

This afternoon I lost functionality of the Alt and Ctrl keys on my Dell XPS laptop. Dexpot is the newest software I installed, a couple of weeks ago, hence I suspect it somehow is not passing these keycodes along to the OS after checking them.

Restarting the machine restored functionality. Wondering if anyone else has experienced this problem?