Hello,
First of all you log into the person's PC you would like to block an app.
Inside the Windows Registry go to
HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Policies.
Now, Inside of Policies you create a new DWORD Value and name it
"DisallowRun" then double-click and type 1 as decimal value. Also, inside of
Policies, create a new key and name it "DisallowRun". Now, Inside that key
create a new string value and name it 1. Inside this "1" key you type the
name of the .exe file you want the user not to run, it must be the exact
name of that .exe file or it won't work.
If you want to block more than one app, simply create as many string values
as you want, just name it 2,3,4 and so..inside those strings you place the
name of the .exe file.
Be careful not to place an important system file there. After that, restart
the system or wait till the user restarts the system.
Hope this helps,
Jaime R.