Thanks very much for your prompt and very helpful reply. I was unaware of the change, but in any case I thought that I had set the Advanced setting. However, when I went back to look, I found to my surprise that it was set on Simple. I changed it back to Advanced (or so I thought) and then asked the Registry Finder to find all instances of "soluto." To my surprise, it found half a dozen or more. Most seemed as if they wouldn't affect anything, but one involved HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\WinLogon: Userinit. That seemed what I was looking for, so I deleted it. And indeed, that seems to have cured the phantom program's trying to start at startup.
Almost all the entries Registry Finder turned up were in HKLM, but one was in HKCU, and it was one I didn't quite understand. It seemed to have something to do with the Program Compatibility Assistant. The key was the following: HKCU\SOFTWARE\Microsoft\Windows NT\CurrentVersion\AppCompatFlags\Compatibility Assistant\Persisted . The Entry's Name was C:\Users\\tempstore\solutoinstaller.exe . The Value was N/A. I'm not sure what this refers to, and whether I can just zap it. I should add that there is no file called solutoinstaller.exe in the tempstore directory, though at one time there was. If anyone can tell me more about this Registry entry and how to deal with it, I'd be most grateful.
Finally, I now think I understand why my JVPT setting was on Simple even though I had set it to Advanced. My netbook, like most netbooks, does not have a very high screen. The Settings screen apparently has two buttons--OK and Cancel--at the bottom, but they extend further down than my computer screen could show! Thus, I had no idea that I had to check OK, and for that reason the setting never changed to Advanced. I thought I'd mention this, since many people have netbooks and, like me, may prefer the screen resolution not be so high that it's difficult to read text. If the JVPT Settings screen were re-designed so that the OK and Cancel buttons weren't so far down, that would be VERY helpful.