  The question of triviality of solutions of the semilinear Ornstein-Uhlenbeck
equation, \[ \Delta w-\frac{1}{2} \langle x,\nabla
w\rangle-\frac{\lambda}{p-1}w+|w|^{p-1}w=0, \] is considered. It is shown, that
if $p>1$ is Sobolev subcritical or critical and $\lambda\leq 1$, then all
bounded entire solutions are constant. Moreover, in the critical case, the same
conclusion holds in the subclass of radial solutions provided that $n\geq 4$
and $\lambda \in \left[\frac{3 n}{2(n-1)},2\right]$.
