CharanMC; looking at this image indicates that what ever drivers you installed on your system isn't recognizing your audio hardware, and why when you look at the image below I captured from your video, the only audio choice you get are your monitors, you should at the very least see "speakers"
I suggest the following
1. remove your audio drivers you installed.
2. use CCLEANER and clean your registry files
3. reboot
4. search for "device manager" and confirm windows recognizes your sound hardware (functional or not ) in this windows (i.e. look below)
if windows recognizes it without driver install.. right click on your speaker on your toolbar and see if it shows there.
if so set it as default, and test it running a music file... does it work. good
Realtek is weird with windows 7 /10, seem system with drivers work well, and seen systems running better without the Realtek drivers.
once you try this get back to us.