Activate Dreamweaver [CS3 is dead]

Question

Yes, I know this is old I've use it about twice a year. My tower crashed could not recover the s/w. I read that I can have the s/w loaded on 2 pc's so I have been trying to load and reactive the s/w for days. I need help this is what I have completed so far.
 
went to www.adobe.com/go/activation (as per phone message).
Instructed to go here Activation or connection error when starting CS3 or Acrobat 8
I signed in
Entered my original serial number for CS3 Web Premium.
Received a new number.
followed instructions to download a downloader then extracted.
No more instructions so I clicked on Dreamweaver and of course it prompted with register/re-register.
So I'm in a loop.
 
I need this s/w to work please.
 
Thank you,
Debra

Nancy OShea · Accepted Answer

It's now 2020. As an update, CS3 activation servers are gone. And Adobe ended access to activation-free installers and replacement serial numbers. Customer Care agents cannot help with this matter. CS3 is officially dead.

If you never upgrade your computer or OS, you could potentially keep using CS3 for another 12+ years. But I'm sorry to say that re-installation is no longer an option.

Nancy OShea · Answer

Just so you know, legacy CS3 is not guaranteed to run on new equipment and operating systems. That's the risk you take with software that has reached its end of life.

That said, the old activation servers were taken offline. First uninstall your old CS3 and run the Adobe Cleaner Tools to wipe all traces of it off your system. And then remove the old hidden Adobe PCD folder from your hard drive. Complete instructions are given in the correct answer below.

Re-activating CS3 (Updated)

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