A: Please enable overlay mode in ComproDTV.
Options->Video/Audio->Enable Overlay
Also, we confirmed that some Asus graphic card with Asus driver has this problem.
Please remove the Asus driver and install the drivers from GPU manufacturer (for example, Nvidia and ATI).
Nvidia: http://www.nvidia.com
ATI: http://ati.amd.com
If you use other graphic card or motherboard-integrated graphic card and encounter the problem, please also try to update the drivers from GPU manufacturers.