Disable Internet access. Unplug Ethernet cable and/or disable wireless. Keep disabled until told to re-enable.
From Apps & Features app, uninstall any instances of the Intel PROSet/Wireless Software and Intel Wireless Bluetooth. When prompted, choose to "Discard Settings".
Manually shutdown and reboot your computer.
In Device Manager > Network Adapters, check for entry for Intel Dual Band Wireless-AC 9560. If none, go to Step 8.
Right click on the entry for your Intel Dual Band Wireless-AC 9560 and uninstall it., choosing to "Delete the driver software for this device".
Go to Step 4.
(Optional but recommended) Clean out all temporary files using the Windows Clean Disk tool. I recommend that you checkmark all categories offered, even if no files currently (so it leaves it set up for next invocation).
(Optional but recommended) Clear each of your browsers' cache.