You might face activation failure. Try these steps:
Adobe Photoshop CS 8.0 uses a product activation system introduced specifically in the CS line. Even if you find a serial number online: adobe photoshop cs 8.0 serial number
Around 2013, Adobe released CS2 (not CS8.0) with a generic serial for legacy users, but this was intended only for existing CS2 owners. Adobe has since clarified that these downloads are not free software. CS8.0 never received such a release. You might face activation failure
Adobe no longer sells CS 8.0. However, you have legal options: you have legal options: