How on Earth do I install XA2 drivers!?

I have literally tried everything. Sony's website does NOT have driver for the XA2!!! What gives?
I'm trying to unlock the bootloader through flashtool but I keep getting this message "Device connected in flash mode but driver is too old".
I also tried the 15 Seconds ADB Installer thing, no luck.

I also tried following Sony's guide but get stuck at the bold part:
Turn off your device.
Connect a USB-cable to your computer.
On your device, press the Fastboot key (Volume up for most devices, see Useful key combinations) at the same time as you connect the other end of the USB-cable.
Windows users: When asked for a driver, open the Devices and Printers directory, click on the fastboot driver and press Update. Browse and point towards the location of the new android_winbus.inf file.
When your device is connected, open a command window on your computer and go to the platform-tools folder within the Android SDK folder.
Enter the following command:
fastboot devices

Verify that you get an answer back without any errors.

I don't have the option to open a CMD, but only powershell, and powershell doesn't let me run the "fastboot devices" command properly. Keeps trying to open an application.

What else can I do? I found some driver online and tried to install it through "legacy" mode in device manager but I keep getting some kind of error.

Can someone please help me out? I really want to root this thing


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