Ok, a double-post:
TechNut, open a terminal (ctrl+alt+t keyboard shortcut) and paste this line into it
sudo apt update
Please paste the output of that to show which repo entries are giving any errors.
Next, in terminal paste in
sudo apt dist-upgrade
This is to upgrade or add to any packages you need. This action may even resolve your issue… But in case it does not, we stand at the ready over here.
Let’s say that your issue with wifi remains after running the above commands.
Let’s try building your wifi
In terminal paste in each line
sudo apt install build-essential git
This installs “git” for grabbing some packages from source
Use it to get the packages:
git clone https://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/backport-iwlwifi.git
Now use the ‘cd’ command to change terminal to that directory
Now use the ‘make’ application to make the build
sudo make install
With that built, we need to give root access and instruct the computer to use it. While GUI installers normally do all this for you, we are doing this manually for now. Good Training
Enter your password for root.
Now configure it
echo “options iwlwifi disable_msix=1” >> /etc/modprobe.d/iwlwifi.conf
Exit and reboot your computer and check for wifi.