user accounts can't access programs installed by admin

[Badams]

When on my domain I install programs as the administrator.
For security reasons the user cannot. But then when a
user signs in they are unable to use the programs
installed. Keep getting error messages about they don't
have rights...the so in so isn't running etc... It can be
resolved by giving the user local administrator rights on
the machine. Then of course that defeats the whole point
of restricting them in the first place...any
ideas...please help!