Afrow UK, you were right.
"Windows Vista and Windows 7 automatically identifies installer executables, including NSIS installers, and asks the user permission to run them with elevated privileges. Automatic detection, however, comes with the price of automatic backward compatibility tricks. One of which is automatic relocation of shortcuts created in the Start Menu to All Users' Start Menu."
I hate Microsoft

It placeв my shortcut to All users start menu and even didn't say "Meow".