Re: I have an old version of Photoshop (CS1) that requires activation but there's no way to activate it. How can I bypass this?

CS and CS2's activation servers were closed down. Adobe has provided free of charge to you a non-activation copy of Photoshop CS2.

You go to this site, download the installer and be very sure to get the serial number next to it, because your old serial number is no longer good.

https://helpx.adobe.com/creative-suite/kb/cs2-product-downloads.html

Gene