In Windows OSs you can face with the problem that you do not have sound: no system sounds, no sound when playing audio/video files and no sound watching video on YouTube and similar resources. The first problem is usually fixed by installing correct audio drivers for the audio adapter. If the audio adapter is integrated into Mother Board, just go to the official Mother Board manufacturer' site, choose correct model, OS and download audio drivers.
Sometimes, even after installing the latest drivers and following the recommendations on YouTube how to solve the problem with sound, you may still not have sound on YouTube.
To Fix This Issue, you need to perform next steps:
1. Install latest Adobe Flash Player. Click here to go to download page.
2. Download fix sound.reg. Click on fix sound.reg to download fix sound.reg (1.70 kb) .
3. After the file has been downloaded, run it, when it prompts you whether you want to add this info to the registry, click Yes.

NOTE: This will work in Windows XP, Vista, Se7en.