Issue: When trying to open *.DOCX documents in Internet Explorer, the file becomes *.ZIP.

Not sure if Windows update fixed this issue yet. But here’s the manual registry fix.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_HANDLING

Change the value of iexplore.exe (NOT explorer.exe) to 0.

Restart IE, or bounce the machine.