Adobe Creative Suite 5.5 ‘Access Denied’ issue, after recent successful installation

Adobe Creative Suite 5.5 ‘Access Denied’ issue, after recent successful installation: "The serial number is not valid for this product"  – Help!

   Hello.  I have an off the shelf purchased Adobe Creative Suite 5.5 Design Premium, purchased in 2012, which I recently successfully installed, on Jan 4, 2025, on a new laptop running Windows 10 Home. I had to interact with my existing Adobe account on their website to complete the process. Nothing popped up to say this started a trial version; this was a purchased version installed from my original disks, and appeared to be successful.

    I used Photoshop on Feb 19th to create files for a print/poster of a painting to take to a printer to have prints made for an upcoming event, on a tight deadline. An Adobe pop-up window popped up on the screen I believe on the 19th or 20th saying I had just one more day to use the product, which made no sense to me, and I had to be somewhere else, so I shut down without taking a screen shot of the exact warning message. At my appointment with the printer on the 21st we discovered I needed to make an adjustment to the PDF file. I went back to my laptop and when I tried to launch Photoshop an Adobe pop-up window told me to enter my serial number, which I did, and received the message: "The serial number is not valid for this product." I had no access to my Adobe software program. In a panic I had to find someone else with Photoshop to help me with the file to complete the print job, at great expense.

   I finally attempted to resolve my ‘Access Denied’ issue, on Feb 23rd, through Adobe Support Chat, which has produced no resolution. Most recently they concluded that I should turn to the Adobe community forums.

   Is anybody familiar with this twist, and know how to resolve the access problem?