From your PM you were having the issue with Logitech, and didn't have Webcam installed.
Make sure you've got latest Logitech software installed:
http://logitech-en-amr.custhelp.com/app/answers/detail/a_id/4096/related/1/session/L2F2LzEvdGltZS8xMzcxNDY5MjE0L3NpZC9TUENFU1lzbA%3D%3DIn Logitech, software,
click"Quick Capture" set to"Photo" click"Controls" on Controller" Resolution: default is 'small'. Change to "15mps" for highest. (for 920)
None of which is relevant using WC7
Remember, you'll be 'backdooring' the Logitech software from WC7. Resolution Settings are done thru WC7.
Brightness, etc done through 'backdoor" Logitech from WC7:
Make sure C920 connected before starting WC7... Close the Logitech software if it's open.
First time, you
might have to reboot pc with cam connected.
Initially WC7 sometimes won't find a cam connected after program started. Some settings in WC7 will require WC7 to be closed and restarted to become effective.
But NOT these:
Open WC7. "Monitor" Right Click "position 1" On 'source' look for Your C920 as a "PCI/USB (WDM driver)". Select it.
Click back on the "position 1 thumb" to select the cam. which chould now show in the monitor window.
I believe
webcam7 will initially default to a low resolution... once WC7 connected to the camera, "Monitor", right click your source thumb,
"Video Format", will show you available resolution modes, select whatever. "Source Settings" is where the Logitech software is called up for Zoom, brightness, etc.