My friend's laptop drive is always at a 100% how can he fix it?

[Silent Ninja]

My friend's laptop was working fine until I convinced him to download voicemeeter, the're audio drivers which shouldn't have caused it and are unistalled now. He has been trying different solutions without any results.
Thank you for you help.

 

[crowell]

I would download an online cloud. Move all important documents And ect. To the cloud. Fix settings so that all future info is automatically backed up. That'll free space