System: a Brand NEW (as in 3 days old) Vista machine (3 gig, dual core).
When I install Adobe Reader, the first time, my .zip files are okay - I can use the built-in uncompress feature to open them. If I shut down and come back the next day, Reader is now associated with my .zip files so I can't open them. The only way is to uninstall reader. I don't want to have to keep uninstalling/reinstalling each time I need to either open a .zip file (which I do frequently) or read a .pdf file.
I don't know what microsoft program to associate them with so I can unassociate the .zip files with Reader and use the built in uncompress command to open the .zip files. (I did find where to set file associations in Vista.)