Yes photoshop 7 didn't have activation, however, one big caveat is your C drive needs to have 1 TB or less
of free space or photoshop 7 won't work and will give an Scratch Disk Full error because photoshop versions
before cs2 couldn't read disk free space over 1 TB.
You need a 24 digit serial number that should be on/in the package. Don't publish that number here.
Also if the package says Upgrade Version, you would need to own a previous version of photoshop
in order to use a upgrade version.
Not to mention ps 7 (circa 2002) is very out of date when it comes to computer software, so if you need to work with any camera raw files or image files from phones, ps 7 most likely won't be able to open those.