Curious problem with PortableApps.exe when using VNC ...
I have a number of machines under my bench, but (for reasons of space) normally only one screen, keyboard, and mouse on the main system ... then I VNC into the machine I want to maintain.
I needed to run a tool from my trusty PortableApps USB stick, so I plugged the stick into the machine of interest, then VNC'ed into it.
Click on the icon in the task bar - it didnt "pop-up"! Consistently!
Plug a "real" screen into that machine and click on the icon via VNC and it is visible on the real screen but not on the VNC session.