*BEST WORKAROUND SO FAR* - For Microsoft Surface users, change your Display Driver from the Intel Iris Xe driver to the Microsoft Basic Display Adapter. This should resolve both the Activation page and the Checkout page. Since I'm doing several returns this year, which means I'll be going through the checkout process multiple times, I had to find a workaround. This worked flawlessly. When I'm done, I'll simply change the driver back.
Step-by-step: Open Device Manager, click Display Adapters, right-click Intel Iris driver, click Update Driver, click "Browse my computer for drivers," click "Let me pick from a list...," select "Microsoft Basic Display Adapter" - Once it's finished, you may need to change settings (it made my scale 300% - I changed it back to 200% Recommended).
