I want to make my USB stick 'inaccessible' for dummy users. So, is there any way to hide removable device from Explorer using registry or an util (which doesn't require new driver)?
You can hide drives in WinXP&Vista using microsoft's discontinued shared computer toolkit "steady state". (Easiest way but only runs on 32bit Pre Win7 OS)
I also know it can be done via group policy.
Look Under User Configuration\Administrative Templates\Windows Explorer You can hide drives there. If this machine is not on a domain, use local policy.