Even if you get it running, you will face modern file issues. A .CR3 file from a Canon R5 will not open. An .HEIC file from an iPhone will not open. You will spend hours converting files before you can edit them.
In 2013, Adobe disabled the activation servers for CS2 due to a technical glitch. To assist existing customers, they released a version that didn't require an activation code. Not Freeware: adobe photoshop cs2 portable free
The most robust open-source alternative. It is highly customizable and handles complex layering and masking. Even if you get it running, you will face modern file issues
: A free, official mobile and web-based version for quick edits. Even if you get it running