Faulty install

[Forpli]

I'd recommend you to follow these steps as you have a ACER notebook and they are often special:

Boots to BIOS after installing Zorin OS

@Chris710 ACER BIOS are often special. In your BIOS you must set a supervisor password in tab security. Once the supervisor password is set, some new menus are accessible. Enter the "Select an UEFI file as trusted for executing" menu. It will allow you to declare the newly installed Ubuntu (=Zorin) boot image as trusted.

These specs of your computer are really few. It is possible that your notebook is overloaded with browsing in internet.
I would recommend you to switch to Zorin lite, which requires less resources than the gnome desktop.
If you are not sure if it may help you or you want a fast solution, you can install the Zorin lite desktop on your current system:

sudo apt install zorin-os-lite-desktop

Then reboot and at login click on your username, then on the eye or Zorin icon in headerbar, then a window opens with the login options. There should be a option now for Zorin lite. Select it and login with your password.

For the error massage:
You could look if there is a BIOS update /firmware update offered for your computer. But note that firmware updates often reset the BIOS to default settings.