Windows has built in zip files added as folders in Windows Explorer. This feature is default support by a Windows standard install. This makes it completely difficult when there are more than on file in the folder or even if there is only one large file with a lot of files and folders inside it.
Here is the solution, run following on Windows /DOS command prompt.
"regsvr31 /u zipfldr"
(offcourse with out quotes)
If you want to register it back then
"regsvr31 zipfldr"
(offcourse with out quotes)
Chow!!