Some Registry Tricks

1. Disable the Autorun Option in your CD Rom Drive:

Open your Registry and navigate to "HKEY_LOCAL_MACHINE\system\currentcontrolset\services\cdrom"
Change the value of 'Autorun', or create a new DWORD value if it doesn't already exist, and set the value as '0' for Autorun disabled.
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2. Disable the Harddisk Lowdiskspace warning in Windows Xp User Key:

"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer"
and
System Key: 
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer"
create a new DWORD 'NoLowDiskSpaceChecks' and change its value to '1'.

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3. Disable the Windows Key


"HKEY_LOCAL_MACHINE\system\urrentcontrolset\control\keybo ard layout"
Create a new Binary value, or modify the existing value called 'Scancode Map' as shown below.
Value: 00 00 00 00 00 00 00 00 03 00 00 00 00 00 5B E0 00 00 5C E0 00 00 00 00

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4. View System BIOS Information:

Open Registry and navigate to
"HKEY_LOCAL_MACHINE\hardware\description\system"

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5. Change the Title of Windows Media Player


"HKEY_CURRENT_USER\software\policies\microsoft\windows medi aplayer\"
Create a new string value called ' TitleBar' and change text as your wish.

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6. Disable Internet access in Network
Open Registry and make the following changes


"HKEY_CURRENT_User\software\microsoft\windows\currentversi on\internetsettings\"
Change the value of "Proxyenabled" to 1 and change the value of "proxyserver" and set it to an ip address. Change the value of the ip address and port to "10.0.0.1:5555"

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7. Disable the ability to Right click on the desktop


"HKEY_CURRENT_User\software\microsoft\windows\currentv ersi on\policies\explorer\"
Create a DWORD "NoViewContextMenu" and change its value to "0" for disabling and "1" for enabling.

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8. Hide all items on desktop


"HKEY_CURRENT_USER\software\microsoft\windows\currentv ersi on\policies\explorer\"
and
"HKEY_LOCAL_MACHINE\software\microsoft\windows\currentvers ion\ policies\explorer\"
create a new DWORD "NoDesktop" and change its value to "1"
You can show all the items in the desktop by chaning the value to "0"

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9. Disable the "Change Password" button in windows


"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\System"
and
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersi on\Policies\System"
Create a new DWORD "DisableChangePassword" and change its value to "0" for disabling and "1" for enabling.

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10. Disable the "cancel" button or pressing the "Esc" key while logging on to Windows"


"HKEY_USERS\.DEFAULT\Software\Microsoft\Window s\Cu rrentVersion\Run"
Create a new string value "NoLogon" and change its value to "RUNDLL32 shell32,SHExitWindowsEx 0"

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11. Remove "Log off" from start menu
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\Explorer"
and
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\Explorer"
Create a new DWORD "NoLogOff" and change its value to "1" for disabling and "0" for enabling. 
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12. Clear the Recent playlist in Media Player
Navigate to "HKEY_CURRENT_USER\Software\Microsoft\MediaPla yer\ Player"
And clear the "RecentFileList" subkey.

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13. Empty temporary Internet files on exit (in Internet Explorer)
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Internet Settings\Cache"
and
"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows \Cur rentVersion\Internet Settings\Cache"
Create a new DWORD "Persistent" and change the value to "0" for emptying and "1" to remove this option.
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14. Clear the Internet Explorere typed addresses history
"HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\TypedURLs"
And delete the subkeys.
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15. Remove recent documents from start menu
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\Explorer"
and
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\Explorer"
Create a new DWORD "NoRecentDocsMenu" and change its value to "1".
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16. Remove Network connections from start menu
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\Explorer"
and
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\Explorer"
Create a new DWORD "NoNetworkConnections" and change its value to "1".

17. Remove My documents from start menu
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\Explorer"
and
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\Explorer"
Create a new DWORD "NoSMMyDocs" and change its value to "1".

18. Remove My pictures from start menu
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\Explorer"
and
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\Explorer "
Create a new DWORD "NoSMMyPictures" ad change its value to "1".

19. Remove My music fro start menu
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\Explorer"
and
"HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\Explorer"
Create a new DWORD "NoStartMenuMyMusic" and change its value to "1".

20. Reboot windows after crash
"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\C ontr ol\CrashControl"
Create a new DWORD "AutoReboot" and change its value to "1".Restart the machine for the effect to take place.

21. Disable the use of MSDos
User Key: "HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\WinOldApp"
and
System Key: "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\WinOldApp"
Create a new DWORD "Disabled" and set its value to "1". Change it to "0" for enabling.

22. Enable Directory completion in MSDos prompt
User Key: "HKEY_CURRENT_USER\Software\Microsoft\Command Processor
and
System Key: "HKEY_LOCAL_MACHINE\Software\Microsoft\Command Processor"
Create a new DWORD "PathCompletionChar " and set it to equal the hex value of the required control character.

23. Quick edit the command prompt
User Key: "HKEY_CURRENT_USER\Console"
and
System Key: "HKEY_USERS\.DEFAULT\Console"
Create a new DWORD "QuickEdit" and set its value to "1" for enabling and "0" for disabling.

24. Disable Registry editing
"HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\ Curr entVersion\Policies\System"
Create a new DWORD "DisableRegistryTools" and change its value to "0" for allowing Regeditand "1" for disabling it.

25. Disable task scheduler
" HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Curr entVersion\RunServices"
Delete the value from "SchedulingAgent". Usually its value is set to "'mstask.exe".

26. Remove My computer from desktop and start menu
User Key: "HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Policies\NonEnum"
and
System Key: "HKEY_LOCAL_MACHINE\Software\Microsoft\Windows \Cur rentVersion\Policies\NonEnum"
Create "{20D04FE0-3AEA-1069-A2D8-08002B30309D}" and change its value to "1" for removing. Change its value to "0" for showing.

27. Show Windows version on desktop
User Key: "HKEY_CURRENT_USER\Control Panel\Desktop"
Create a new DWORD " PaintDesktopVersion" and change its value to "1" for showing and "0" for removing.

28. Remove My documenst from desktop
Windows 95, 98 and Me
"HKEY_CURRENT_USER\Software\Classes\CLSID\{450 D8FB A-AD25-11D0-98A8-0800361B1103}\ShellFolder"
Windows NT, 2000 and XP
"HKEY_CURRENT_USER\Software\Microsoft\Windows\ Curr entVersion\Explorer\CLSID\{450D8FBA-AD25-11D0-98A8-0800361B1103}\ShellFolder"
Modify the value called "Attributes" as "0xf0500174" to hide or "0xf0400174" to show.

29. Disable Scan disk after improper shutdown
" HKEY_LOCAL_MACHINE\System\CurrentControlSet\Contro l\FileSystem"
create a new DWORD "DisableScandiskOnBoot" and change its value to "01" for disablng and "00" for enabling.

30. Automatically end Hung programs.
" HKEY_CURRENT_USER\Control Panel\Desktop"
and
"System Key: [HKEY_USERS\.DEFAULT\Control Panel\Desktop"
Modify the value of "AutoEndTasks" to "1".