PC boots straight into Windows 10 instead of launching grub

I recently purchased a laptop, an Acer Aspire R15 with these specs: 17 7500U, 12GB DDR4, 256GB SSD, GTX 940MX 2GB.

It comes preinstalled with Windows 10, but I wanted to install Debian in a dual boot configuration for programming.

Anyways, I installed Debian on the C: drive in a separate partition, and installed grub. When I restarted the PC, it went straight into Windows 10 without launching grub. I did several google searches and ended up trying this, but this method did not work and yet again, my PC booted straight into Windows. I then tried this, which also did not work. I then tried directly installing reFIND through debian after booting into debian with a usb flash drive of refine to try to see if I could use refind as a substitute for Grub, but that also did nothing.

TL;DR: My pc boots directly into windows instead of loading grub, and I tried every method I found to fix this, but none of them worked. Can someone help me get my pc to boot with grub?