I'm using the current version of SDR#, but this problem started several versions ago (I'm not sure exactly when, because I hadn't upgraded for a very long time but wanted to try out the recent version with a bandplan display.) Every so often, my mouse will freeze for a brief time. I don't need to be accessing my RTL stick for this to happen, all that needs to happen is that SDR# is open, receiving anything or not. Using the RTL stick in HDSDR doesn't cause this problem. Has anyone else seen anything like this?