  We discuss the complete virtual and soft-photonic O(alpha) corrections to AA
-> W+W- within the electroweak Standard Model for arbitrary polarized photons.
In the on-shell renormalization scheme for fixed M_W no leading corrections
associated with the running of alpha or heavy top-quark and Higgs-boson masses
occur. The corrections turn out to be of the order of 10%, but can become much
larger where the lowest-order cross-sections are suppressed.
