How to Reassociate Zip Files with Vista's Built-In Compressed Folder Function

For whatever reason, your Microsoft Vista machine may have a third-party program (or no program) associated with the creation and opening of zip folders.  If you want to reassociate Vista's built-in compressed folders function with zip folders, do the one of the following:

Command Prompt
  1. Hit the Windows key and the R key simultaneously (WinKey +R)
  2. Type cmd in the search box (below it should say this task will be created with administrative privileges)
  3. Once the Command Prompt opens, type: assoc .zip=CompressedFolder
  4. Hit enter
  1. Use the WinKey+R method described above and  type regedit and press Enter.
  2. Navigate to this branch: HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\Explorer\FileExts\.zip.  Click on .zip in the left hand navigation pane and then right-click and select Export and name the backup "reg backup zip" or something like that and then save.
  3. Next right-click on the "UserChoice" sub-key and select Delete.
  4. Exit the Registry Editor.
Download a File Association Fix at
  1. Go to
  2. Follow the usage instructions on that page.
  3. You may want to bookmark the page for future reference to repair other file association problems.

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