Sound level at 100% on startup

Hi, whenever I start my pc up the sound is always at 100% and the sound level graphic is showing on the top left corner of my monitor. If I reboot immediately the graphic has gone but the sound is still at 100% but can be lowered.
I've had a good look around the internet but can't find a resolution to this, can anyone here help, please?

I'm running OS version 21H2 (22000.282)

Hi and welcome to the forum
From what you're describing it sounds like the audio driver is reinstalling itself or resetting itself when you restart your device. Are the drivers from Realtex? One possible fix could be to get the latest drivers for your device and reinstall them.

That might just clear up the issue.
HTH.