CONTINUED. Thing is I had no difficulties loading PR!!! Go figure.
Meant LR as in Lightroom
Provided the products serial number. How do I add a screen print of the error msg? It reads "A problem was encountered while trying to load the trial period for Adobe Photoshop CS3>" etc I wasn't asking for a trial copy! I own the darn thing!
Let's try a Clean Install
First uninstall, then use the Cleaner Tool: Use the Creative Cloud Cleaner Tool to solve installation problems
After you successfully run it, it should remove any records interfering with the install.
Next download a fresh CS3 installer: Download Adobe Creative Suite 3 products
Right-click on the installer and choose "Run as Administrator" from the context menu. It allows CS3 full install privileges.
Be sure when you activate, your firewall or Anti-virus is not blocking anything.
You will also have to add in the updates. Adobe - Photoshop : For Windows
Hope it goes well for you.