If you manage to find a legitimate copy of the Adobe Photoshop CS3 Full Version, here is exactly what you are getting:
If you have a serial number and the installer: Adobe Photoshop CS3 Full Version
For Windows 11 users: Right-click the installer → Properties → Compatibility → Run as Windows 7. If you manage to find a legitimate copy
Photoshop CS3 was distributed as a paid desktop application under Adobe’s Creative Suite licensing. As a legacy product released in 2007, official sales, support, and downloads from Adobe have long since been discontinued or replaced by newer Creative Cloud offerings. Users seeking similar functionality should consider modern Photoshop versions for security, compatibility, and ongoing updates. For Windows 11 users: Right-click the installer →
eBay, Craigslist, or thrift stores may have old CS3 boxes. You need an unused serial number. Adobe’s system will flag a serial that has been activated too many times.