Prevent Windows from mounting the external drive?

From some reason whenever I launch the add and remove control panel Windows starts accessing my external Firewire drive and it seems to keep it from loading the programs list, forcing me to unmount the drive and relaunch the control panel. The drive is just for Time Machine and I don't need access to it in Windows, is there a way to prevent Windows from mounting the drive. I'm using Macdrive so changing the format won't help.

Hi Brian,
usually I would propose to either pull the power plug of the external harddisk or the USB-/Firewire- connection before booting up into Window.
If this is a Firewire-connected harddisk you might have success with disableing the 'IEEE 1394 Host controller' in the Device Manager (Control Panel - System - Hardware).
Hope it helps
Stefan

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