Win 7 64bit No Audio Output

Audio has suddenly stopped working as though Muted. Sound was found to be muted on Task Bar and in Media Player. Corrected but no Sound. Changed to Test Speakers (Known to be good), No Sound. Tried Earphones, No Sound. Installed Realtech Audio Driver for Gigabyte MB, No Sound. This Driver replaced some other Brand Name Audio (like aynsyn ????), which unfortunately, I did not record. Used Windows Audio Player Troubleshooter, Nothing found wrong. Right Clicked Speaker on Task Bar, Playback Devices, Can seen Audio Bars actively playing, up and down to music. Everything indicates that Audio System is functioning as normal, but nothing is coming out of Rear Output Jack to the Speakers. Cannot find any other point where it could be Muted, but this is what it seems to be like. Cables and Connections are good. No explanation for why it stopped working in the first place and why Volume was Muted, which I had not done. I have never had an Audio problem I could not solve before. I believe I have tried everything there is to try.
Can anyone please assist with this Nasty.

Six Screenshots attached.
Also, as part of testing I installed a PCI Sound Card, but still had the same result. Wondering if it may have been affected by a Virus or Malware, I scanned with Spybot, MalwareBytes and MSE; Spybot found 11 pieces of Vermin, but the problem has not changed, Sound is working but not going to speakers.

Do we not have an Expert who can help solve my problem.

your screen shot never posted. got to remember that people here are volunteers and do it on their own time. can't be expected to get a reply in minutes. everyone has things to do then just be on here so be patient will get help.