Hi ajgreeny and all,

It is a mystery here.

Yesterday, I played here several hours and couldn't solve the problem of those sounds generated on moving the mouse pointer (including reinstalling Google Chrome).

Today I start my PC, the mentioned problem, narration sound, disappeared. Then I test a mp3 file and a mp4 file and they work, no narration sound generated on moving the mouse pointer.

Then I start Firefox playing Youtube video. The video work properly with sound but without narration sound.

Then I start Google Chrome, playing online video and the video work properly with sound but no narration sound. However playing the video on Firefox becomes without sound.

Re-starting PC unable to solve problem. Online video played on Firefox without sound but online video played on Google Chrome with sound. However no narration sound is found on moving the mouse pointer.

The "Del" key on the keyboard doesn't work, pressing "Number Lock" key unable to solve problem. Hitting "Del" key either typing "." (dot) or popup the "Find Window".

However
Settings -> Sound
on the right column
Volume Levels
All items unable to adjust

That is the present situation

Regards