I’m liking Windows 10 but it has a lot of bugs that make it look like it is still a beta software. One of the most annoying bugs is that the volume icon simply disappears (this usually happens to me when windows 10 wakes up from sleep). Even restarting doesn’t always help. Here is a weird solution I found (which is still just temporary solution but it beats restarting). Going to Notifications & Settings then “Turn system icons on and off” doesnt help because Volume option is greyed out.
This is what helped. When the volume icon goes missing do this:
1. Click on search icon (near start menu) and type “display”.
2. Click “Display settings”
3. Change the size of text to 125% and click apply.
4. Do not log out!
5. Change the text size back to 100% and click apply.
6. Now sign out and then sign back in.
For some weird reason the volume icon is back! Hopefully it works for you too. This (setting text size) might mess up your desktop icon alignment a little but it is not really a problem.