Talking with a friend he mentioned I might be able to cancel it on my old computer and re-activating it here. I can't do this as my old computer doesn't even launch anymore. so yea.
No help still?
Was your CS5 a student/teachers edition?
A Volume Discount version?
An upgrade from an earlier suite?
Or the full-scale version?
think you can install and activate PS CS5 on 2 machines.
When one of mine active machines crashed, I called Adobe support and they reset my license so I could reinstall and activate on my key.
You say "doesn't register". Please let us know what actually happens, with full error messages.