A interesting topic!!!!
How to run any application at the lockscreen of Windows 8/8.1/10!!!
yeah, u read right .Now I'm gonna show u how to run any application at the lockscreen.
For this you will need Administrator privilege and some cmd knowledge
First, login to your account(Admin.) go to C:\Windows\System32
then search cmd when you find it just copy it to your desktop. Rename it sethc and paste it in the same folder from where u copied it. It will ask to overwrite a file just do it. if it fails to copy just change the permissions to read/write and try again.
now log out ...
at the lock screen press shift key 5 times.....
That's all now, let your cmd knowledge work. Hint :u can also hack any account using it. 
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