On the machine you won't be using anymore, help>deactivate.
Install on the new machine using the original media.
(1) Explicitly deactivate the software from computer B. This deactivation can be found on the pull-down under Help.
(2) Install the software on computer A from your original media. You cannot simply move the software. It must be totally installed. Note that if you have an OS version that is not supported by CS4, then all bets are off!
(3) The software will activate on computer A when you install and run it.
Thanks Bob and Dov. That actually sounds much simpler than I expected it to be. The new computer is only a year old and is built to handle graphics software, so I think it should work.
The issue isn't how new or old the computer is, but rather which operating system and version of same you are running under. You cannot switch from Windows to Mac or vice versa for going from computer B to Computer A. And if the OS version on computer A is too new for proper OS support by CS4, it may not install or run properly.
At the moment I'm running CS5 Illustrator on the new computer. Is that a good indication that CS4 programs will load and run successfully?
No. But that said, if the machine is running Windows 7 you should be fine.
Windows 8 will be a crapshoot.
And congratulations for ASKING here before you made your transition.
It's much harder to fix afterwards if you bumble in and just try to copy stuff manually.
But be sure to uninstall the CS5 and reinstall both in chronological order to prevent overwriting of shared libraries with earlier versions.
If you have any
- customized workspaces (InDesign, Illustrator)
- color swatch sets (Illustrator, Photoshop)
- modified Illustrator new document profiles files
- customized Photoshop actions
- customized Acrobat joboptions or batch ("action") sequences
find the files for those on your old computer first (before deactivating), copy them, and note the file paths for each so that you can use them on your new computer without having to set up workspaces, etc. from scratch.