That sounds more like the Adobe Reader upgrade destroyed your proper .pdf extension handling than Spybot-S&D hijacking it.
What we've found so far:
- If you click an unassociated file with Windows XP 64 or later, Windows will ask you what to do with it.
- If you click an unassociated file with Windows XP 32 or earlier, unknown files will be opened with the first "all files" handler available.
By unassociating .pdf, we could reproduce this. But then, if .pdf is not asociated with any app, there's something wrong
![Wink](images/smilies/wink.png)
Skip a few paragraphs now if you're not interested in the technical background.