There is no native method in WIndows to increase the volume past 100% in Windows.
The best first option would be to go to the support page for your PC on the manufacturers website to download and re-install (not update) the version of Audio drivers they provide.
If that does not resolve the problem, open the old COntrol Panel.
Set View at the top of the old Control Panel to large icons.
Open the Sound Applet.
On the resulting utility, select your speakers or output device and click Properties.
On the next dialog check if there are any audio enhancements available.