volume decreases automatically on lenovo z500, windows 8

parag10101

Prominent
Jan 10, 2018
1
0
510
hi
i am using lenovo z500 ,windows 8.
i just recover my laptop to its initial point .after recovery suddenly the volume goes down automatically again and again .
whenever i press the volume up button .volume goes down ,
and volume bar popup again and again .
i already have made changes like :
do nothing in communications
disable all sound effects in enhancements .
so plzz help me with this