Step 1: Open Run and type Notepad.It will open notepad.

Step 2: Type the Following in that notepad,

[General]
Manufacturer=”Your Name”

[Support Information]
Line1= Your Contact Address
Line2= Your Contact Number

Step 3: Save the file with the name “oeminfo.ini”

Step 4: Save the picture which you want place in My Computer
properties with the name “oemlogo”.Make sure it is “.bmp”
file

step 5: Open Run and type System32.It will open that folder.

step 6: copy these two files(oeminfo.ini & oemlogo.bmp) and place it
in System32folder.

step 7: Now it is done.you will get your picture and information in
“My Computer” properties.

Source :
Some Orkut Community

Purpose :
Customization of your computer