Have installed PI 1.8.6.1448 on PC with
Windows 7 Professional
When moving the mouse over the vertical "Process Explorer" bar, i get a black workspace window without tools.
Pressing STG + ALT + H (or R..) opens the HistoryExplorer AND gets all other parts of the screen ok back again.
So, blacking out the WS Screen in my installation is connected only with the Process Explorer Bar.
Found a solution for the screen blackening on my Win 7 installation.
Open a second instance of PI which works than perfectly, no blackening of WS when moving the mouse over
the Process Explorer Bar!!
Next Step, i close the first instance of PI and PI runs nicely on my Win 7 Installation.
This could be a hint for the user, before going back to 1.8.5 try starting PI as a second instance.
Maybe for the developer a hint for checking the Process Explorer Bar routines.
I am not a Win Guru - dont wont to become one anyhow - so i assume everything of Win 7 is installed properly but cant proof this.
Hope this helps - i can work with the latest version of PI under WIN 7 now without problems.
Gerald