Hello,

Don't exacly know what title will be actual to describe the problem, so I'll explain what had happened. Very strange picture.

I tried to capture the part of the second monitor with Techsmith SnagIt and found I can select well area on primary display only, but it became white if I moved the cursor to the second or third display. Reinstall - the same. Removed and installed Lightshot, the same again, so that's not just the SnagIt problem, looks like grobal config problem. I turned off DF, tried, the same. I went to DF -> Monitor Config and saw the following:



2 and 3 are black, nothing, but there are windows there, icons. I checked DF -> Moniror config screenshots in Google/Images. People see the actual thumbnails of desktops there, not black rectangles. Any ideas?...

DF 9.4.3
Win 10 LTSC 1806
1 + 2 displays in Nvidia GT640 via DVI
3 - onboard Intel 4600 via DVI

No, didn't touch it. Just tring to catch an idea and asked you as far as you are multimonitor config gurus. Don't know DF or not, looks like on system problem, but too idiotic. Cannot even to complete the right Google request for this, tried different before to write.

No, any difference at all.

...

Ha! Just FYI, I rolled back step by step system partition backups and found the problem. Comodo Secure Shopping that was. Removed