Audio stopped working suddenly on windows 7

I use windows 7 with Ubuntu 14.04 in dual boot for years. I have recently encountered a problem on my windows 7. My headphones are not working. The audio driver from realtek detects unplugging or plugging in of the headset but it's not giving any sound.
The computer port is okay and the headphone is good too as I can hear everything in my Ubuntu. There was not any problems with the windows too. It was working fine. But recently I've encountered this annoying problem. I used to use a software Soundwire which
used to send audio to my smartphone over wifi. even that is not working or not even connecting. The things I did around the time when the problems started was:
1. I was cleaning up my PC uninstalling unnecessary programs. I did NOT uninstall any audio drivers.
2. I installed Virtualbox for few virtual OS testing.
The things I already tried:
1. Obviously Tried the Troubleshooter for audio playback which doesn't detect any problems.
2. Tried uninstalling audio driver then shutting down computer and reinstalled audio driver. Did NOT work.
So any help about this? It really occurred suddenly.

In addition to the replies, check your device manager for any issues.
have you check the hardware and sound on the control panel for any clues?
check out links below:
http://windows.microsoft.com/en-sg/windows/tips-fixing-common-sound-problems#tips-fixing-common-sound-problems=windows-7
http://windows.microsoft.com/en-SG/windows/no-sound-help#no-sound=windows-7&v1h=win8tab1&v2h=win7tab2&v3h=winvistatab1&v4h=winxptab1
Every second counts..make use of it. Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.
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