Install and Activate (old) Serial Number Programs
Please know that talking about this or that or some other word or phrase in the Adobe license terms is not going to change several simple facts
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A serial number program will continue working on the computer where it is activated as long as that computer keeps running... so in that respect the license really is perpetual
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A serial number program may or may not install on a new computer... almost certainly NOT on a new Mac due to how much Mac hardware and the operating system have changed
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On Windows 11 some (old) serial number programs will install and run... HOWEVER...
Nancy OShea posted 8-31-26 in an Elements discussion that versions prior to 2022 are NOT compatible with Win11. Users have reported catastrophic system failures after installing older Elements on a new machine that lacks an optical CD/DVD drive. It seems there’s a security conflict with legacy CD/DVD drivers that causes Win11 to brick up, requiring a full system restore or factory reset. Use older Elements versions at your own risk of failures. (Note - I have both Premiere Elements v2021 and Photoshop Elements v2021 on my Win11 computer with ZERO problems... but I do have a DVD drive in my home built computer, so I will GUESS that the programs did not try to install legacy CD/DVD drivers since the installer correctly 'saw' the newer drivers in Win11)
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Plus, there is the fact that the activation/deactivation server for versions before CS5 has been removed from service... so activating/deactivating the programs that were managed by that server is now completely impossible (I don't know what other programs were managed by that server)
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Asking an Adobe employee to activate/deactivate or manually adjust an activation count for ANY serial number program... including CS5-CS5.5-CS6 or any Elements program... is simply not going to happen due to Adobe's current policy on support of serial number programs
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Only you may deactivate https://helpx.adobe.com/download-install/kb/activate-deactivate-products.html
https://helpx.adobe.com/x-productkb/global/reactivate-older-apps.html
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The information on a user's account page for 'remote' deactivation is only for subscriptions, not for serial number programs
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Like it or not (and I understand not liking Adobe's policy) there is nothing anyone may do to help if the two allowed activations are 'lost' due to computer problems or the old computer not properly connecting to a server that is still in service to deactivate a program... some people have reported that the 'local' program on a computer 'thinks' it is deactivated but on the server the deactivation was not properly registered (see next)
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TLS 1.2/1.3 is now required to connect
browser test https://clienttest.ssllabs.com:8443/ssltest/viewMyClient.html
https://helpx.adobe.com/download-install/kb/unable-to-reach-adobe-servers.html
https://helpx.adobe.com/x-productkb/policy-pricing/activation-network-issues.html
https://docs.microsoft.com/en-us/mem/configmgr/core/plan-design/security/enable-tls-1-2
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And, even though Premiere Elements v2021 is only 5 years old... on 9-6-26 in a discussion Steve Grisetti (who has written books about PrEl) mentioned no longer being able to activate v2021 (this was a video editing discussion, so I may only 'presume' that Photoshop Elements v2021 will also not activate)
https://community.adobe.com/questions-725/i-cant-open-my-premiere-elements-2021-and-cannot-use-it-i-tried-reinstalling-but-keep-getting-an-errorr-message-that-the-keys-are-wrong-is-there-any-way-i-can-use-this-again-1640644
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The bottom line of all that is no serial number program is supported, and some of them may no longer be deactivated on an old computer or activated on a new install (or a reinstall on the same computer)
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Two ideas that MAY work to install and/or run old programs in Windows 11
-RIGHT click the program icon or EXE and select a compatibility mode in the pop up option window
-and/or select Run as Administrator to assign FULL Windows permissions
-also https://helpx.adobe.com/x-productkb/global/create-local-administrator-account-windows.html
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A sort of sideways addition
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Hardware crashes or virus infections or simple software problems happen, so you should buy AND USE software to make a full backup of your hard drive to an external drive... plus, making step-by-step backups during a new setup or major program addition makes it easy to go back a step if something doesn't work... I have had to do this once when a program install didn't work properly (a different program, not Adobe) and I had to do a restore due to my drive being SO messed up that I couldn't even uninstall the bad program
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This backup and then restore is, of course, only to the same computer with a new drive (or the same drive as long as you don't mind writing over everything) since doing a restore to a new computer requires extra steps due to Windows and many programs having activation information that is keyed to your hardware (which is why Windows will force you to RE-Activate if you change very much hardware)
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There are several backup and restore programs available
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The product I bought and use is at https://www.terabyteunlimited.com/image-for-linux/
Note that I get NO benefit if you buy the program, I only use it and like what it does
Version 3+ allows restoring to a larger drive and expanding the partition to fit
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Image runs off of a bootable CD or USB Flash Drive via Linux (the Zip you download includes a program to make the CD or USB, the program uses less than 1Gig) and it reads EVERYTHING on the drive, even the hidden registration information, so everything is restored when needed... and you may not only restore the image over a messed up install, you may restore to a brand new drive in case of a hardware crash, and not have to re-install anything... as I said above, restoring an image to a new or greatly changed computer is very likely going to require reactivating Windows or other programs
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I do a backup a couple times a year to a second internal drive (and copy that backup to an external drive) the backup of my C drive is 'about' 45Gig in one file... depending on the space used on your C drive you should be able to do a backup to a USB flash drive that has enough capacity... 128Gig flash drives don't cost a lot when compared to the risk of losing everything
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I have actually done this restore one time... when a program I bought had a faulty installer that totally mangled the Windows registry... I had done a restore before installing the bad program so I did not lose anything when I had to do the restore
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If you have an Adobe program with a serial number, and you don't want to risk losing that program and not being able to do a new install or reinstall, buy and use a total drive backup program

