I play Fortnite and whenever I hold down the left mouse button, I automatically go forward. It can't be on my equipment as it only happens on Fortnite. In the settings, I find nothing synonymous. I play Fortnite btw. Under Windows 10.
Maybe it's worth reinstalling fortnite. Or reset your settings at Fortnite
I'll try that, I'll say if it worked or not.
Okay, I just noticed that I have selected as a second key to run forward the left mouse button.
You should look at your settings in the settings. Maybe automatic sprinting is stored on your left mouse button