If you are having trouble with the right click option in Windows 10 when using a Wacom pen you should go into the Wacom settings and disable the “Use Windows Ink” option for all programs to get rid of that stupid circle symbol that appears when you click a button, but add Photoshop and enable windows ink there since pressure sensitivity won’t work without it.
Then use the run bar to open a dialog box called “Flick” and disable “Use the Pen as a right button equivalent” and make sure the pen options are set to single tap, then on the lower right of the Windows home screen click the Windows Ink Space options “Pen and Windows Ink Settings” and turn off visual effects. Windows is horrible isn’t it?
More Information on Fixing Wacom, Photoshop, and Windows compatibility problems is at http://embscomputerart.com/fixing-pressure-sensitivity-in-adobe-photoshop-cc/
Special Note for Photoshop 2020: If you use Photoshop 2020 you have to leave Use Windows Ink Enabled for the Photoshop application in the Wacom settings to get pressure sensitivity. But with any version before that you’ll need a different workaround. See the link above for details.
If you get a message saying something like “the tablet driver is not running” when first booting into windows or when trying to run the wacom tablet program in an attempt to change settings you need to restart the Wacom Professional Service manually. Sometimes this problem is caused by a windows update for some reason, but it’s easy to fix.
This site has the instructions which I summarize below in case the link is ever broken: https://www.drivereasy.com/knowledge/wacom-the-tablet-driver-is-not-running-solved/
Summary of above: On your keyboard, press the Windows logo key and R at the same time to open the Run dialog. Type services.msc and press Enter to open the Services window and go to the service labeled “Wacom Professional Service” and right click on it and click restart. And to make sure it is set to automatically run at startup right click again and go to properties and change the startup type to automatic if that isn’t already selected.