Although it has been out for some time Windows 10 is still receiving mixed reviews. I guess it’s like Marmite? When using it with a touchscreen I think it is even better.

If you don’t have a touchscreen and are still using a keyboard, here are some handy keyboard Shortcut Keys:

Shortcut	Description
Windows key	Open and close the Start menu.
+1, +2, etc.	Switch to the desktop and launch the nth application in the taskbar. For example, +1 launches whichever application is first in the list, numbered from left to right.
+A	Open the action centre.
+B	Highlight the notification area.
+C	Launch Cortana into listening mode.[1] Users can begin to speak to Cortana immediately.
+D	Switch between Show Desktop (hides/shows any applications and other windows) and the previous state.
+E	Switch to the desktop and launch File Explorer with the Quick Access tab displayed.
+H	Open the Share  charm.
+I	Open the Settings  app.
+K	Open the Connect pane to connect to wireless displays and audio devices.
+L	Lock the device and go to the Lock screen.
+M	Switch to the desktop and minimize all open windows.
+O	Lock device orientation.
+P	Open the Project pane to search and connect to external displays and projectors.
+R	Display the Run dialog box.
+S	Launch Cortana.[2] Users can begin to type a query immediately.
+T	Cycle through the apps on the taskbar.
+U	Launch the Ease of Access Center.
+V	Cycle through notifications.
+X	Open the advanced menu in the lower-left corner of the screen.
+Z	Open the app-specific command bar.
+ENTER	Launch Narrator.
+SPACEBAR	Switch input language and keyboard layout.
+TAB	Open Task view.
+,	Peek at the desktop.
+Plus Sign	Zoom in.
+Minus Sign	Zoom out.
+ESCAPE	Close Magnifier.
+LEFT ARROW	Dock the active window to the left half of the monitor.
+RIGHT ARROW	Dock the active window to the right half of the monitor.
+UP ARROW	Maximize the active window vertically and horizontally.
+DOWN ARROW	Restore or minimize the active window.
+SHIFT+UP ARROW	Maximize the active window vertically, maintaining the current width.
+SHIFT+ DOWN ARROW	Restore or minimize the active window vertically, maintaining the current width.
+SHIFT+LEFT ARROW	With multiple monitors, move the active window to the monitor on the left.
+SHIFT+RIGHT ARROW	With multiple monitors, move the active window to the monitor on the right.
+HOME	Minimize all nonactive windows; restore on second keystroke.
+PRNT SCRN	Take a picture of the screen and place it in the Computer>Pictures>Screenshots folder.
+CTRL+LEFT/RIGHT arrow	Switch to the next or previous virtual desktop.
+CTRL+D	Create a new virtual desktop.
+CTRL+F4	Close the current virtual desktop.
+?	Launch the Windows Feedback App.

[1] If Cortana is unavailable or disabled, this shortcut has no function.

[2] Cortana is only available in certain countries/regions, and some Cortana features might not be available everywhere. If Cortana is unavailable or disabled, this command opens Search.

Thanks to Microsoft Download Centre for the information.