See the link below where such is discussed. See the mention of an Adobe patch for AMD processors but everything else seems to indicate it works fine.
https://social.technet.microsoft.com/forums/windows/en-US/7da56157-720a-431c-9df0-7fdc259eb472/cs3-compatibility
If got a relative who uses CS3 on his Win7 laptop and no problems.
Hope this helps.
Grif
Hello! Does anyone know if Windows 7 works well with
Photoshop CS3?

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