I will read more of the discussions already here, but I'm starting to think that DisplayFusion may be responsible for all the random system freezes I have been seeing. I'm running a 64-bit Windows 7 system with two monitors on a NVidea GeForce GTX 560 Ti video board. There's no apparent reason for the lockups and no way to reproduce them. Both monitors are using a spanned background image. What finally convinced me that something in the video system is causing the problem is that today I was prevented from moving the cursor from one screen to the other. Sure would like to see a fix to this because setup with DisplayFusion is so much simpler than using the NVidea software.

It can go for hours without freezing or it can repeatedly freeze over and over after reboots. There's no apparent pattern. I will try exiting and running without it to see if the problems continue. This will require me to configure the monitors with NVidea however... which stymied me initially. I've also considered uninstalling DisplayFusion completely for a while to see if that has any effect.

Thanks, will get back to you tomorrow after I test this later tonight.

Dave.

So far without DisplayFusion no more random freezes. I'll continue to test the system this way over the next few days to see if there are any repeats.

Dave.

I went over all this with my computer technician today and we found a number of suspect issues in the Event Viewer. One of the suspect items was DisplayFusion just prior to these lock ups. But there were other possible problems as well. Strangely even after DisplayFusion was completely uninstalled the Event Viewer still identified DF in some of the freezing events.

Our next step is to completely reinstall Windows 7. We'll also check the drives and main system board. It just isn't clear yet at this point what the source of this problem is.

Thanks for your concern, Keith, but I don't think there will be much more to see here until after the holiday and our attempts at a rebuild are complete.