This trick is for all those people who want to hide tons of data into
their box. So here it is, if you have very important data in your hard
drive placed in some partition which you do not want anybody to access
then this trick is only for you!
Just click on start>run type gpedit.msc, now navigate through user
configuration> administrative templates > windows components> windows
explorer, now double click on “Hide these specified drives in My Computer”
modify it accordingly then just below you will find another option
“Prevent access to drives from My Computer”, double click on this option
and modify it accordingly.
To make it visible again select "disable" by double clicking on the “Hide
these specified drives in My Computer” option.