Essential Windows Keyboard Shortcuts

After reading an interesting tweet about the time saved utilizing shortcuts, but with no useful link attached I figured it’s worthwhile to do a post about the basics I use daily.

OS
'PrtScn'	- Save screen capture to clipboard.
'Windows button'	- Opens start menu.
'Windows button' + 'Tab'	- Show all active windows in task bar.
'Windows button' + 'm'	- Show desktop \ minimize all.
'Windows button' + 'l'	- Lock computer.
'Alt' + 'Tab'	- Toggle open programs.
'Alt' + 'PrtScn'	- Save focused window as screen cap to clipboard.
General App Shortcuts
'Ctrl' + 'z'	- Undo last action.
'Ctrl' + 'y'	- Redo last action.
'Crtl' + 'o'	- Open.
'Crtl' + 's'	- Save.
'Ctrl' + 'w'	- Close active file/window.
'Crtl' + 'q'	- Quit application.
'Ctrl' + 'f'	- Find.
Text or files & folders
'Ctrl' + 'a'	- Select all.
'Ctrl' + 'x'	- Cut to clipboard.
'Ctrl' + 'c'	- Copy.
'Ctrl' + 'v'	- Paste.
Browser Shortcuts
'F5'	- Refresh current page.
'Ctrl' + 'F5'	- Force reload of current page.
'Backspace'	- Back to previous page(s).

Update (2012/06/17):
http://www.microsoft.com/enable/products/keyboard.aspx
Currently the above link provides all the Microsoft shortcut keys you’ll ever need: Windows, Internet Explorer, Office 2003-2010 to name but a few.