Plugging iPhone into PC turns PC off

Every time I plug my iPhone into my PC it will not recognize the phone and will result in a shut down of the computer. Why is this happening?

eirkare,
There are a couple of possibilities.
Does the computer power off, or does it just restart?
If it just restarts it could be because of a Blue Screen error. Windows XP got rid of a lot of "blue screen" error seen in previous version by defaulting to restarting on its own without showing the blue screen.
The most common blue screen with the iPhone is because of drivers for other hardware trying to treat the iPhone as something it isn't. For example a web camera's driver trying to access the iPhone as a web camera, or a scanner driver trying to access the iPhone as a scanner. Usually that can be resolved by downloading the latest version of the driver for the other device. This article has more details:
http://docs.info.apple.com/article.html?artnum=306048
If it is actually powering off, and not restarting, it could be related to your power supply. Have you added any internal hardware or USB devices since you got the computer?
Hope this helps,
Nathan C.

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iPhone: Hardware troubleshooting
http://support.apple.com/kb/TS2802
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Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIs and corrosion.
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Regards,
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Plugging iPhone into PC turns PC off

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