Windows 10: Audio increases and decreases automatically, want to stop this and remove the top left menu...

Audio continues to bounce up and down from 0 to 100 without me doing anything which is extremely annoying, don't know what else to say, new to this sorry

:)

 

Volume keeps decreasing to zero automatically

The volume icon is stuck on the top left of the screen, and whenever I increase the volume using the display or keyboard it keeps spiraling down to zero/mute. I have run my anti virus program, malwarebytes, and audio troubleshoot but they all detected nothing.
I have updated the realteck high definition audio driver, rolled it back, even unistalled it and rebooted my computer, but the problem persists.

The strangest thing is when I switch my laptop to tablet mode the volume becomes stuck at 100 and increases automatically to 100 whenever I try to decrease it.

I would appreciate help with this issue.

 

Increase/decrease levels of text in PowerPoint

In Powerpoint, to increase/decrease the current line of text to the next higher/lower level I have 2 options:

1. Click to the left of the line and then press Tab / Shift-Tab

2. On the Home tab, in the Paragraph group, click the Increase/Decrease list level button

For a few months I have realized that in some documents I can do it, but in others I can only do it with option 2. Why can't I continue using option 1 (it's faster for me)?

***Moved from Windows / Windows 10 / Settings***

 

Laptop brightness automatically decreases to zero but if I press refresh, backspace, enter, shift or spacebar keys it stops decreasing

I have turned off automatic display brightness and I don't think it is a display hardware issue as when I started the BIOS i didn't have any changes in brightness. I got an old Lenovo Ideapad Yoga 13 windows 8 i5-3337U and 4gb ram working after maybe a year of non-usage. The battery is fine it works after unplugging the charger also. Now that those details are out of the way here is the problem.

Now the problem is that as soon as I start the laptop the brightness just decreases in steps all the way to zero. If i try to increase the brightness by pressing the button it decreases again at the same rate so I have to hold the brightness up button for it to be maximum then if I press backspace, refresh, enter or spacebar keys it stops decreasing and everything is normal. After that if i press any of the number keys or brightness decrease key (f11) it again starts to decrease. Please suggest a solution I'm at the end of my wits here.