What about a wifi adapter?
Do not use WiFi for mining.
It's unsecured and unstable.
Can you use a flash drive to install it on rigs or is a disc copy better? Also, what wifi adapter do I need?
You can use
Rufus to make a
bootable flash drive containing Windows Installer.
Youtube or Google for the procedures, it's easy as
riding a bike.
But make sure that your copy of Windows is authentic, there are a lot of fakes with
Malware Activators in the Market, especially online stores.