This is the solution Reduce the Color Depth on the thin client from 32bit to 16bit or Create a larger RAM Drive, 96MB instead of 32MB  Thanks, Marc
Hi There  We have a little problem with multiple monitors. Client: Windows 7 Embedded on HP ThinClients with App Portal VDI: Windows 7 on Hyper-V with vWorkspace 7.6  Span multiple monitors in full screen is enabled. Sometimes after logon is complete the second screen is black, only the mousepointer is visible when you move to the second monitor. Sometimes after logon the desktop is spanned over both monitors perfect.  I think its about 50/50%  For the situation when the desktop is not available on both screens i have the following solution. After login, go to the blue connection bar at top of the screen, down the client or smart size the window, then go back to full screen and the desktop is well spanned over both monitors.  Any hints ideas, tips or tricks or should i create a spport request?  Thanks in Advanced  Marc
Multiple Monitor Issue