You're right, Adobe have no interest in unsuported versions.
1. What verion are you trying to install?
2. What separate qualifying version are you trying to enter?
3. Who has emailed Photoshop updates, because Adobe do not?
I reload PS C5 And in a while I get an update (Yes from Adobe ) notice to update Raw, CS5, Bridge, etc. When I click to update it tries to download them says the 4 items failed to download try again. then when you click customer service I get the message above. This exact same thing happen when we tried put 5 on a new computer.
You have to have the update especially for raw .
I have all versions since ver.2 but I used 4for qualifying version this time.
Your # 3 Yes this is from Adobe.
The easiest way to find something lost around the house is to buy a replacement.
An installation error message when clicking customer service? Too weird for me.