System hang through usb device

If this problem is really occure when you connect the data cable via usb port make sure that your ep instollation is properly or not .If you were installed the os service pact 2 in the system very quickly it may do happend.It certain to check your available memory,processor speed & ram,s performance.Becoz sometimes insufficient memory can cause the symtem hang.if you have installed you data driver properly this may be the reason.