I'm posting this for those of you that find this thread via websearch (like I did)...
I just replaced my HP laptop (Vista-x64) which ran PSP 7 just fine, with a ThinkPad running Windows 7 x64
SP1. I was able to install from my Jasc product CD (as Administrator) without problem, but when I ran it, I got the pop-up mentioned earlier in this thread ("did not run properly" or something like that). I then set the executable to run in XP-SP3 compatibility mode, and got a security-popup instead.
However, on a whim, I set the compatibility mode to
Win 2000, and PaintShop Pro 7 (SEVEN) is
running fine without error(fingers-crossed).
Happy Photo-editing!
jmn