Delete All files fully from HDD.....No one can retrieve it...

You can use the "cipher /w" command-line command to wipe deleted files from the hard 

drives of computers running "Windows.. This will prevent someone running a software 

program such as the free "Recuva Free Edition" from recovering files that you have deleted.


Command Prompt


cipher  /w:e: 


Type at least one space between the "r" in "cipher" and the "/". 

There must be one colon to the right of the "w". 

There must be one colon to the right of the "e". 

However, instead of "e", you might have to substitute the drive letter of the actual 

drive that you wish to wipe.


All u can see in the Below tutorial link


TUTORIAL

In Many ways you can Change Login Screen....Just Click & Study

1st Way

2nd Way

3rd Way

4th Way

How To Change Windows 7 Logon Screen Easily

Download

http://www.julien-manici.com/windows_7_logon_background_changer/


In the Logon Changer U just click any of the pic "APPLY"

After that U pls goto

C:\Windows\System32\oobe\Info\backgrounds

U can see some pics that you have clicked "APPLY" earlier...


Delete the existing images 

Replace it with ur own images....

My two google sites....its under construction

                                   

Try & First Select your Research Area...How???

I am sharing one link.....

NS2.....Network Simulation..U want to study???

IITK prof Rajeev.S

I am sharing his ideas....Everything have a solution....

Lets see... 

U can use CommandPrompt Online....If Ur computer stucked!!!

How???

Just Click here........Soln