;

-: Calculations On Command Prompt :-

The command processor CMD.EXE comes with a mini-calculator that can perform simple arithmetic on 32-bit signed integers:

C:\>set /a 2+2
4
C:\>set /a 2*(9/2)
8
C:\>set /a (2*9)/2
9
C:\>set /a "31>>2"
7

Note that we had to quote the shift operator since it would otherwise be misinterpreted as a "redirect stdout and append" operator.

For more information, type set /? at the command prompt.

HOW TO OPEN COMMAND PROMPT WHEN BLOCK BY ADMIN

Open notepad

Write www.command.com

Save as cmd.bat at dektop

When u entered on it then command prompt will open

Enjoy~

C:\windows\system32\cmd.exe

HOW TO OPEN REGISRTY WHEN BLOCK BY ADMIN

c:\windows\ regedit.exe

copy the above code at url path in c: drive then enter now registry can be open.....enjoy

-: Increase Virtual RAM - To Make Your System Faster :-

Follow the steps given below :-

1) Hold down the 'Windows' Key and Press the 'Pause/Break' button at the top right of your keyboard.
Another way is Right-Clicking 'My Computer' and then Select 'Properties'.

2) Click on the 'Advanced' tab.

3) Under 'Performance', click 'Settings'.

4) Then click the 'Advanced' tab on the button that pops up.

5) Under 'Virtual Memory' at the bottom, click 'Change'.

6) Click the 'Custom Size' button.

7) For the initial size (depending on your HD space), type in anywhere from 1000-1500 (although I use 4000), and for the Maximum size type in anywhere from 2000-2500 (although I use 6000).

8) Click 'Set', and then exit out of all of the windows.

9) Finally, Restart your computer.

10) You now have a faster computer and 1-2GB of Virtual RAM..!

HIDE DRIVE IN WINDOW XP

How to Hide the drives(c:,d:,e:,a:...etc)

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_USERSoftwareMicrosoftWindowsCurrentVersionPoliciesExplorer

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........

DELETE AN “UNDELETABLE FILE”

Open a Command Prompt window and leave it open.
Close all open programs.
Click Start, Run and enter TASKMGR.EXE
Go to the Processes tab and End Process on Explorer.exe.
Leave Task Manager open.
Go back to the Command Prompt window and change to the directory the AVI (or other undeletable file) is located in.
At the command prompt type DEL where is the file you wish to delete.
Go back to Task Manager, click File, New Task and enter EXPLORER.EXE to restart the GUI shell.
Close Task Manager.

Or you can try this

Open Notepad.exe

Click File>Save As..>

locate the folder where ur undeletable file is

Choose 'All files' from the file type box

click once on the file u wanna delete so its name appears in the 'filename' box

put a " at the start and end of the filename
(the filename should have the extension of the undeletable file so it will overwrite it)

click save,

It should ask u to overwrite the existing file, choose yes and u can delete it as normal

>> How to create 3D Effect for Window

You can create 3D effect for your window Explorer
1- Click Start Menu > select Run, type "regedit" (without quotes) to run Windows Registry Editor.
2- Find and go to following key: HKEY_CURRENT_USER \ Control Panel \ Colors
3- Change ButtonHiligh value to 128 128 128, and change ButtonShadow to 255 255 255
>>> ButtonHilight=128 128 128
>>> ButtonShadow=255 255 255
And finally close Registry Editor and reboot your computer

How to copy text from a Command Prompt

1-Right-click the title bar of the command prompt window, click Edit> and select Mark.
2- Now, you can select the text you want to copy, just click and drag the cursor to select the text.
3- Right-click the title bar, click Edit> and select Copy.
4- Paste the text on your editor

How to remove File Menu in Windows Explorer

1- Click Start Menu > select Run, type "regedit" (without quotes) to run Windows Registry Editor
2- Find and go to to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
3- Create a new Binary Value and name it NoFileMenu, give it value of 01 00 00 00
4- Close Registry Editor and reboot your computer.

Note: Incorrectly editing the registry may severely damage your system. before making changes to the registry, make a backup copy