>>I uninstalled today Adobe Acrobat Reader 3.0, since I had Acrobat 4.0 full version installed. My pdf become not associated with any program. Then I used Open with option and set it to something wrong. The question: what should I set it to and how should I do it?
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>Shift-Right-click on the file, and the Open With menu option will be there.
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>Select Acrobat in the list or use the browse button to find the Acrobat Reader EXE. In my list over here, Acrobat is AcroRd32.
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>HTH!

Thanks Sylavain. Well, I've uninstalled Adobe Acrobat 4.0 just now. Now I'm waiting for instructions of our network administrator how to install it back :)