How to Hide the drives(c:,d:,e:,...etc) in Ur Computer

This is a great trick you can play on your friends. To disable the display of local or networked drives when you click My Computer.

1.Go to start->run.Type regedit.Now go to:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

Now in the right pane
create a new DWORD item and name it NoDrives (it is case sensitive).
Now modify it's value and set it to 3FFFFFF (Hexadecimal) .
Now restart your computer.
So, now when you click on My Computer, no drives will be shown(all gone...).

To enable display of drives in My Computer, simply delete this DWORD item that you created.Again restart your computer.You can now see all the drives again. Magic........lol....

Disable CD Burning

Exciting isn't it?

The user can't burn any CDs by this trick. This restriction will disable the use of the inbuilt CD recording functions of Windows.

Open your registry and follow this path: HKEY_CURRENT_USER>Software>Microsoft>Windows>Current Version>Policies>Explorer and
create this key: "NoCDBurning" and set its value to 1. Close you registry and logout/restart your system for the change to take the effect.

Reverse the mouse buttons

1) No context menu

What will you see when you right click on the desktop? You will see a context menu which says arrange icons, refresh,..and so on. Are you angry at your friend for not wishing you for you B'day? Do you wanna play a trick on a newbie in your family who is new to computers? This is a cool trick to play. By this tweak, you will be able to disable the right click on the desktop or any icons/files/folders/applications... But right click will work on taskbar of the start button and registry. So, dont worry!!!
Open your registry and you will see all unknown files like HKEY_CLASSES_ROOT....... and so on. Don't panic. Follow this path. HKEY_CURRENT_USER>SOFTWARE>MICROSOFT>WINDOWS>CURRENT VERSION>POLICIES>EXPLORER. On the right side of the registry, you will see two files(in general) named 'default' and 'NoDriveTypeAutoRun'. Right click on the empty space in the registry and goto New>DWORD VALUE and name it as "NoViewContextMenu". Remember, no spaces and N,V,C,M should be capitals. Right click on this and click modify. The default value will be 0. Change it to 1. Note: DONOT CHANGE THE HEXADECIMAL TO DECIMAL. Click OK. Close your registry and logout. Bingo!!! Once you login again, right click wont work. Your friend will be perplexed and the next thing he/she does is call the system administrator not knowing that not all system administrators will be knowing about registry. Now, to enable it again. follow the same path and set the value to 0. Logout and then login to see the effect.

2) Reverse the mouse buttons
This is a cool trick to play on newbies. Actually, there are two ways to do this. One is changing the settings in the Control panel and the other is through editing registry. You can do it either way. But I prefer the second way, which is challenging.
(i) Through Control Panel - goto Start> Control Panel> Printers and other hardware> Mouse. In Button configuration, enable the switch primary and secondary buttons option and click OK. But remember, you have just swapped the mouse buttons. So, for OK, you have to click the right mouse button. The newbie will be perplexed. Well, this trick is good for left handers.
(ii) Editing the registry - By default the left mouse button is the primary and the right is secondary. Open your registry and follow this path:
HLEY_CURRENT_USER>Control Panel>Mouse and on the right side of the registry, create this String value(REG_SZ): 'SwapMouseButtons' and set its value to 1. Bingo!!! You are done. Log out/Restart the computer.

You can try this: Combine tricks 1 and 2. That means, this will result in swapping of the mouse buttons and disabling the left click(once the buttons are swapped). User is ready to call system administrator cuz he feels that the system is behaving wildly.

Chat With Command Prompt

If you want personal chat with a friend

you don't need to download any yahoo messenger
All you need is your friends IP address and Command Prompt.

Firstly, open Notepad and enter:

@echo off

:A

Cls

echo MESSENGER

set /p n=User:

set /p m=Message:

net send %n% %m%

Pause

Goto A

Now save this as "Messenger.bat". Open the .bat file and in Command

Prompt you should see:

MESSENGER

User:

After "User" type the IP address of the computer you want to contact.

After this, you should see this:

Message:

Now type in the message you wish to send.Before you press "Enter" it should look like this:

MESSENGER

User:27.196.391.193

Message: Hi

Now all you need to do is press "Enter", and start chatting!

Create Your Own Logon Message

1 Click start
click run
type regedit,
then click ok!

2 In The registry editor, drill down to the following key:
hklm\software\Microsoft\Windows NT\Current version\Winlogon.

3 Right click LegalNoticeCaption,
click modify,
Type: THIS IS NEXT TRICK,and then click ok!

4 Right click legalNoticeText,
click modify, and then Close your message!

5 Restart Your Computer.

6 The message will appear every time you logon!

Simplest Intercom

Using old phones

Using your old phones, you could create personal "micro" telephone exchange as simple as above circuit.
I manage to solder the test circuit less than a minute. Than connect the phone and test it.
It works. So why 39 ohm?
From
Epanorama Dot Net,
the correct value of the resistor should be a resistor that can limit the circuit current around 30mA total loop.
The method is by replacing the resistor in the circuit with a variable resistor, plug in the phones, apply power and tune the current
with the variable resistor so the current flow is 30mA.
After that take out the variable resistor and measure the resistance/ohm across it.
Find the fixed resistor with the nearest ohm reading to it and replace it to the circuit.

Simplest Circuit

Testing In Progress