Volume is low even though it is at 100%

What is the make and model of your computer?

Press Windows key + X
Click Device Manager
Expand Sound, video and game controllers

Right click your audio adapter
Click Properties
Click the Driver tab

Is there an option rollback?
If so, click it.

Open Start, type: change sound card
Select the Playback
Right click your Speakers
Click Set as Default Device if it isn't already

Select your speakers
Click Properties
Click the Levels tab
Use the slider to adjust level

Hi Catharina. I'm Greg, a volunteer installation specialist and 8 year Windows MVP, here to help you.

Please run the Sound Playback troubleshooter at Settings>Update & Security>Troubleshoot.

Update the Sound driver from the PC's Support Downloads webpage. If no newer then uninstall the one presently installed in Device Manager, reached by right clicking the Start Button. Restart PC to reinstall.

It's possible this was caused by a Windows Update so if nothing above works, go to Settings>Update & Security>Windows Update, check the Installed Updates list for Updates that might have been just installed, try uninstalling them using the Uninstall button present there. Then hide the Updates using the Hide Updates tool downloaded from here: http://download.microsoft.com/download/f/2/2/f2...

If no Updates listed this could also be the latest Windows 10 Version 1709 Update which you can check at Settings>System>About and if necessary roll back at Settings>Update & Security>Recovery, then hide with the tool given above to wait for it to mature.

Or you can try the most stable method to update to the latest version (which you need anyway) by installing Media Creation Tool and then choosing to Upgrade Now: http://windows.microsoft.com/en-us/windows-10/m...

I hope this helps. Feel free to ask back any questions and let us know how it goes. I will keep working with you until it's resolved.