Mpt driver not recognized

I have Windows 7 on my Dell XPS M1530 laptop. I used to be able to connect my iPhone and my laptop recognized my iPhone and opened the option to upload my photos to my laptop. Also it displayed in my Computer as a drive that could be accessed manually if I chose.
Now, however, it does neither. iTunes recognizes it still, just fine in fact. My laptop does not. When I go to device manager and plug the iPhone into the USB cable it shows up as MPT USB Device with a yellow triangle that contains "!". When I open it, it has this error "This device is not working properly because Windows cannot load the drivers required for this device. (Code 31)".
I've uninstalled and reinstalled iTunes. I've attempted to Update driver and Windows says its up to date. I've scoured the internet. I've even tried going to the cmd prompt and typed "Net localgroup Administrators local service /add" as some websites have suggested. The result was "The specified local group does not exist".
So I'm at a loss. The only option left to me is to email myself these photos one by one. That would be fine if I only had 10 or less. I have nearly 300. I went to Disney World in Decemeber and I was able to upload all my photos without issue then. Since sometime in January, my laptop stopped recognizing my iPhone.
Please help.
AJ

Have you installed iTunes
http://www.apple.com/itunes/
The iTunes installation should installed the necessary device driver.

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Mpt driver not recognized

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