How to disable access to the MACOS's HFS+ partition when running MS Windows in a Boot Camp partition
From Tech-Wiki
When running MS Windows in a Boot Camp partition Windows can access the MACOS HFS+ partition (read/write).
To disable this, rename this file from:
C:\Windows\System32\drivers\AppleMNT.sys
to:
C:\Windows\System32\drivers\AppleMNT.sys_orig
Restart Win 7.