My 64-bit W7's Applications' System Sounds' volume keep changing.

Hello.

Once in a while, my updated 64-bit W7 HPE SP1's Volume Mixer's Applications'
System Sounds get lowered even if I put it back. Why?
https://image.prntscr.com/image/koiY...pBW8CIqN3w.gif for a screen
capture/shot of it. The only way to fix it is to reboot my old desktop PC.

Thank you in advance.
--
Happy Holidays/Merry Christmas/Season's Greetings!
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
/\___/\ Ant(Dude) @ http://antfarm.home.dhs.org
/ /\ /\ \ Please nuke ANT if replying by e-mail privately. If credit-
| |o o| | ing, then please kindly use Ant nickname and URL/link.
\ _ /
( )