These keyboard shortcuts will help you perform faster and better and every Windows user should know most of these as these are the essential ones !!
Windows System Key Combinations

F1: Help
CTRL+ESC: Open Start menu
ALT+TAB: Switch between open programs
ALT+F4: Quit program
SHIFT+DELETE: Delete item permanently

Windows Program Key Combinations

CTRL+C: Copy
CTRL+X: Cut
CTRL+V: Paste
CTRL+Z: Undo
CTRL+B: Bold
CTRL+U: Underline
CTRL+I: Italic

Here are a Few Easter Eggs and Windows hidden tricks for you guys, added them to make one big collection .
System Protected Folders
Ever notice that in the Program Files folder there are two folders that you can’t delete? Xerox and Microsoft Frontpage?
Reserved files and folders
You can’t create a folder called CON, AUX, COM1, COM2, COM3, [...]

So you have a Fatal error: the system has become unstable or is busy, It displays some blue screen an you are left with no option but to restart your computer .Well then, You have just been struck by the Blue Screen of Death. Anyone who uses Microsoft Windows will be familiar with this. What [...]

Hello friends, here is an interesting comparison between the two most popular Software distribution licenses currently being used in the software Industry .. have a look at them and decide for yourself which is the best ..
Some features about software covered by the EULA (End User License Agreement) for Microsoft Windows XP:

copying was prohibited
could be [...]

Microsoft has officially confirmed that you will no longer be able to purchase a copy of Windows XP after June 30th, due to Windows Life-Cycle Policy, and the only exceptions are shipping in Ultra Low-Cost PCs, like the Asus Eee, or shipping preloaded on new machines. The ULPCs exception ends on June 30, 2010, or [...]