Using an external DVD-Drive seems impossible with NB100 Win XP

I'm working with my NB100 half a year.
Now I want to connect an external CD/DVD-drive to I.
The first drive I bought, was bad luck. Often I needed to restart my system several times until it was found, but than it worked. Now I gave that drive back and tryed another one.
Often a message occures "berspannung an USB-Hub", (don't now how to translate correct - but it means the power needed is to much).
So I took an USB-Hub with it's own power-suply. Now it sometimes works, but than imidiately it is calld a "unknown device", and so it does not work until I reboot the system. With a little luck than it works for a few minutes until it "disappears" again.
Am I unlucky, or is there a mistake I dont now?
Thanks for help

The notebooks USB ports provide an standard power supply which is about 500mA.
This is a standard and usually all external USB devices should support this as well
But sometimes such external devices needs more power and it could happens that an device will not work properly
I have no idea what external device you are using but I would recommend using the one recommended and supported by Toshiba
Usually you should be able to purchase such ODD from an Toshiba authorized service partner in your country
Nevertheless its advisable to change some settings in device manager which are related to the USB ports.
You should go to device manager -> USB root hub properties -> Power Management (last tab) and should check if the option is not marked.

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