A:AnswerIt should work just fine if you go to the bank's website. Whether a hotel's WiFi is secure is going to depend on how they've got it configured, and how you've got your computer set up.
A:AnswerYes, you can-although, just as a "heads up", once you switch out, you can't switch back. The directions for doing it are here: https://support.microsoft.com/en-us/help/4456067/windows-10-switch-out-of-s-mode