Right-click a file → Open with → Choose another app. Tick 'Always use this app' to make it permanent, or just open once without changing your default.
Right-click any file → Open with → Choose another app. Tick 'Always use this app' to make it permanent, or leave it unticked to open once with a different app.
Lower brightness, enable Battery Saver, close unused apps, turn off Bluetooth and Wi-Fi when idle, and switch to dark mode — five small changes for noticeably longer battery life.
Windows Hello face recognition gets better with use — add a second scan in different lighting via Settings → Accounts → Sign-in options → Improve recognition.