Hi Nick, the freeze is only within the eeschema window. The system cursor still moves but the eeschema cursor stops at its last position). Therefore I am able to close the window (red cross button at top left), reopen eeschema and continue until next freeze. My first thought was a problem with the MS win10 mouse driver (I am using a logitech mouse), but the replacement with the latest logitech driver did not help. The failure happens statistically. Best regards Roland Am Di, 2017.11.28 14:22, hat Nick Østergaard