How to set u a backdoor in windows

In windows 7:
1) Go to c:\windows\system32

 2)Copy cmd.exe to desktop

3) Rename it as sethc.exe
You will get a dialogue box saying that you don’t have rights to move it in to system32 or for replacing sethc.exe the cmd.exe you should follow these sub-steps:

a)Right click on sethc.exe in system32

b)Open properties

c)Click on advanced in security tab

 d)Click on owner
e)Click edit
f)Change owner from “trusted installer” to “administrator”

g)Click apply
h)Then go to ‘security’ tab in properties
i)Click edit
j)Click on ‘administrator’

 k)Check the option enabling full control

l)Click on apply

4)Copy and paste the renamed .exe file to system32 again.
That’s all now just tap shift key 5 times and see the magic even at login time.

In windows xp:
Just copy cmd to desktop and rename it as sethc.exe and paste it back in system32. Original sethc will be replaced by new sethc.exe no other permissions required.
After opening cmd by tapping shift keys 5 times type the given code(syntax is given,replace accountname with administrator or accordingly)
Net user accountname *

 In future for accessing the pc on which you have done the above hack just do the following tap shift key times continuously and cmd opens.just type the below code and you can enter the pc without a password(we have resetted it).
So what to think, just follow the above trick and be ready with a backdoor to access any pc your friends,school’s,office or anywhere when you get an access……….