Adobe permits you to use your Premiere Elements 10 purchased serial number on only 2 of your computers. If you want to put that serial number on a 3rd computer then you have to "Deactivate" the installation on computer 1 or 2 to get this Premiere Elements 10 purchased serial number on computer 3.
By the message that you are getting on computer 3, you are telling us that your Premiere Elements 10 is on more than 2 of your computers already (computer 1 and 2) and you want to install it on another (the 3rd computer).
So, where do you have Premiere Elements 10 installed?
Go to one of those Premiere Elements 10 computer setups. Open Premiere Elements 10 to its workspace. Go to Help Menu/Deactivate and click on Deactivate to do just that. Close out of there. At this point, you can
a. leave the program installed but deactivated on computer 1 or 2 as the case may be
b. uninstall it from computer 1 or 2 as the case mya be.
Please review and let us know if the above is clear and works for you.
That did the trick. I didn't think about going to the workspace for some reason. Thank you.
Great, great news. Glad that worked for you.
but what if you no longer have access to that computer
If your purchased activated serial number for Premiere Elements 10 is trapped in a crashed computer, then only Adobe can help you.
You should be able to take care of that using online Adobe Chat Activation and the link
Adobe ID and Signing In
Adobe ID, Signing In, Account Information
Adobe allows the customer to have the purchased activated serial number on no more than 2 of the customer's computers. And, then using them one at a time.
It is up to Adobe how it will treat your particular situation.
Please let us know the outcome as your schedule permits.