Step 1: Find the drive partition which you want to hide (except your windows installation partition).
Step 2: Go to start and search for Computer Management
Step 3: In the left panel go to Disk Management and right click on your partition which you want to hide.
Step 4: Click on Change Drive Letter and Paths... and from there click on Remove.
Step 5: Go to My Computer and Refresh it.
Now Your Selected Partition is Not showing there.
Done !!!