Video used to work perfect. Now since last Wed it turns off every so often

My camera was great until last week.

It was on and suddenly went, when I tried to reconnect it was black and got no pict.

I rebooted computer and it was fine (for the duration of the call).

It then happened again on next meeting (usually an hour long), it collapse after 2 minutes and never came back. When I tried after work when I manage to make it come back the image was blurry!

I had unistalled, zoom, the camera (and downloaded a new drive). I opened another application (Never used camera for anything else)... with camera and had it open for 30 min and worked ok. Im unsure why this is happening HELP!!