New Windows shortcuts
Win + A: opens support center
Win + S: starts Cortana
Win + C: starts Cortana in voice command mode
Win + I: opens Control Panel
Win + Tab: opens Task View
Win + Ctrl + D: creates new desktop
Win + Ctrl + left/right arrow: switches from one desktop to another
Win + Ctrl + F4: Closes current desktop
Standard Windows shortcuts
Win: Opens/closes the Start menu
Win + X: (Windows 8.1 & 10) Opens/Closes Start button's contextual menu
Win + left/right arrow: glue the current window to the left/right part of the screen
Win + E: launch File Explorer
Win + L: Lock your desktop
Alt + PrtSc: Takes a screenshot of current window and copies it to clipboard
Browser shortcuts (work in Edge and most other browsers)
Ctrl + T: Opens new tab
Ctrl + D: Bookmark current page
Ctrl + L: Selects current URL
Ctrl + Tab: Switches to the next tab
Ctrl + Shift + Tab: Switches to the previous tab
Ctrl + Enter: Adds ".com" to the URL