Equium A100 shuts down or freezes when I connect a USB device

I'm getting desperate now but everytime i connect a USB device which draws power from my laptop ie sat navi or mobile phone or ipod the thing just lock up or shuts down.
Any ideas will be extremly welcome; I have checked the battery issues and made sure that my power supply is in order but am at a loss!!!!

First of all you should reinstall the OS with the Toshiba recovery CD to ensure that this is not a hardware issue. Then you should update the OS to the latest state. All MS hotfixes and patches should be installed.
If possible try to update the BIOS. Sometimes 3rd party devices are not fully supported and therefore a BSOD could appear.

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