I've tried to follow your instructions to hide my "H" Driver, but nothing happend at all.
i did step 1.run regedit from start menu.
& i did step 2.Go to following Key HKEY_CURRENT_USER\Software\Microsoft\Windows\Current Version \ Policies\Explorer
& also step 3.Create new "DWORD" and name it "NoDrivers" Successfuly, & in the fourth step i put the decimal 128 & restarted my pc but nothing happened. So what should i do to correct this situation.