Alt+Space, M... then Arrow keys and left click.  It could be off screen and this should snap it into visible space.

If that's not it, look at KB 53523.

Good call, Kevin. I wonder if it's Broadcast Shutdown - who thought up that one? That has certainly caused more problems than it has ever cured, hasn't it?

Good call, Kevin. I wonder if it's Broadcast Shutdown - who thought up that one? That has certainly caused more problems than it has ever cured, hasn't it?

Our most common fix (for a workstation startup problem) is removing the Sage 100 folder out of My Documents. 

We never recommend using the Broadcast Shutdown, and our clients don't typically do that kind of thing themselves, but I've certainly heard of significant issues traced back to that feature.

Thanks for the tips.  Broadcast Shutdown in SY_System.M4T shows as already set to N.

This happened to 2 sage workstations as soon as they started up this morning, maybe a coincidence but...   The newer machine is the one giving me the trouble.  The older machine was an easy fix with adjusting sage back to the primary display, and the Alt-M did show sage.  But with this newer machine, nothing....      Both machines had windows updates last night.  

I un-installed the updates.  I think I will completely remove sage workstation and then try a clean install and see if that fixes it.  

Always a windows update....

Did you try removing this file?  The KB article mentions renaming the folder, but I think this is the applicable file for that issue.