Hide the service partitions from prying eyes? X200t & Vista

[BentoPad]

I want to remove the recovery and service icons from "Computer" in Vista on my x200t. I need them to function the same way but without the access through "Computer".
I have successfully hidden the recovery partition by removing the drive letter but get an error message when I try to do the same for the service partition. The error reads:

"Windows cannot remove the drive letter of your volume. This may happen if your volume is a system or boot volume, or has page files."

Does anyone know if its possible to remove the service icon from "Computer" in Vista? Thanks in advance.