Syncing problem.

When ever I plug my iphone into the usb port it doesn't open up itunes right away. Once I open it my self it doesn't show my iphone summery. I tired updating the usb software and it wont let me a error message shows and says ' Windows cannot verify the digital signature for the drivers required for this device. A recent hardware or software change might have installed a file that is signed incorrectly or damaged, or that might be malicious software from an unknown source. (Code 52) ' How can I fix this situation ?