Can't start video, try closing other programs that might be using your webcam

Question

I am using skype on win8. It was perfectly fine until last week. This message "can't start video, try closing other programs that might be using your webcam" is always there. I investigated this problem in the forum.  I did this but it did not help at all. I checked nothing was using webcam! Try to reset skype settings Exit Skype : From the system tray >> right click on the skype icon and click "Quit Skype" Click Start >> Run Type: %appdata% Rename folder "Skype" to "Old_Skype" Re-run Skype 
I tried some other chatting software and it gives me the same problem. However, the metro app camara is working perfectly fine. I have the latest driver and I also tried another webcam from logitech and it gives the same problem!!!! 

Answer 1

Most likely this is one of the registry keys that need to be modified. However, be very careful when you make any changes to your Registry Database. Make always a copy of this data base before making any changes, so you can always revert to the original settings if something will go wrong. The relevant keys are these that refer to Imaging devices. On my system I have 3 such devices: Logitech c920 webcam, LifeCam VX-5000 webcam and CanoScan LiDE 25 Scanner. The last is installed but not currently connected to the computer. You can make a search in your registry database using this item: imaging devices. For all the items I could find on my system, the main key of the type, HKEY_LOCAL_MACHINE\SYSTEM\ControlSet00X\Control\Class\{6BDD1FC6-810F-11D0-BEC7-08002BE2092F} was looking like this:   There is neither LowerFilters nor UpperFilters value defined. You can open the subkeys of the type 0000, 0001, 0002, etc. and see what device they are referring to.