If you have an ACER laptop, please perform the following extra steps: AFTER installing Arch Linux and setting up the loader in the FAT32 EFI partition, the steps are:
1- Get into BIOS - by pressing F2 when computer boots
2- Set Supervisor password
3- Ensure Secure Boot is on
4- Go to "Select an UEFI file as trusted for execution" and choose: EFI - arch - grubx64.efi
5- Turn off Secure Boot
6- In section 'Main', select F12 Boot Menu and change it to 'Enabled'
7- Optionally, clear Supervisor password
8- Save BIOS settings and restart
9- Press F12 on boot and now you can choose Arch.