Fix Zip Handler in Windows7

7Zip is our friend

Sometimes our favorite Archive software (7Zip, WinRar, WinZip to name a few) can break the native Windows’s zipped folder behavior. To fix it back to the way it was before, just unregister zipfldr.dll and re-register it.

To unregister Windows 7 built-in zip file compression, and then to re-register it, use these two commands in a CMD prompt opened with Administrative privileges (“Command Prompt” under Accessories in the Start Menu, then right click and select Run as Administrator):

(Unregister Zipped Folders)
regsvr32 /u zipfldr.dll

(Reregister Zipped Folders)
regsvr32 /i zipfldr.dll

This is useful if you are installing a Zip program like 7Zip or WinRAR and the install blows up, you can use this to fix the way Windows handles Zip files.