I haven't tried cs on windows 7, but i do have it installed on vista x 64, in which uac is similar to windows 7 maximum setting and seems to run fine. There are a few small glitches with imageready, but photoshop cs itself seems to work fine. I just installed cs as an administrator (right click on the installer and choose Run as administrator) Once installed it should run normally without having to run as an administrator.
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