Disable Screen Saver

To disable a screen saver that has been enforced by Group Policy, open the registry and delete the following keys under HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Control Panel\Desktop
ScreenSaveActive REG_SZ 1
ScreenSaverIsSecure REG_DWORD 00000001
ScreenSaveTimeOut REG_SZ 1800

Vista / Windows 7 / Windows Server 2008: Disable hibernation

1.	Click Start, and then type cmd in the Start Search box.
2.	In the search results list, right-click Command Prompt, and then click Run as Administrator.
3.	When you are prompted by User Account Control, click Continue.
4.	At the command prompt, type powercfg.exe /hibernate off, and then press ENTER.
5.	Type exit, and then press ENTER.

Blackberry: Pearl 'Numlock'

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Press # & hold down Alt key (the one with 2 arrows), to turn off hit alt key again