To Make Windows treat .zip files as FILES instead of FOLDERS:
1. Click the Windows START BUTTON.
2. Click RUN - This will cause the Run Dialog Box to open.
3. Paste the following command line into the textbox just to the right of Open:
regsvr32 /u zipfldr.dll
4. Click OK.
This will unregister the zipfldr.dll file, causing Windows to treat .zip files as FILES instead of FOLDERS.
Notes:
1. To reverse the above and make Windows treat .zip files as folders instead of files, follow the exact same steps but use this command line instead: regsvr32 zipfldr.dll
2. The above instructions should work for XP or earlier... but not on Vista or Win7 machines.
This Microsoft "feature" of treating .zip files as folders instead of files (my opinion) is one of the more stupid things ever released. It renders applications designed to unzip files completely unable to "see" .zip files as files in the first place.
This "feature" was not well received by the software development community and was discontinued when Vista was introduced.
If your machine is Vista or Win7 chances are the zipfldr.dll is not even on your machine.