I installed PDF24 only a few days ago so I am using the most recent version. As a test, I installed it on another of my PCs running Windows7 and it does work fine. I don't know if it is a Windows XP problem or if my particular Windows XP computer has the problem. I am going to try and find another Windows XP computer to install it on and see what happens. If it works fine, then I'll know it is probably a problem with my particular PC, which will make it more problematic to solve.
Of course, if anyone else has had a similar problem and solved it (or didn't solve it) that would be a good lead too...
Thanks in advance for any more info.