Fresh install of Win7 on a Dell Inspiron 2305 and all the drivers Dell linked me to did NOT resolve all unknown drivers. The missing one:
Winbond IR Receiver (NTC5572D)
Here you go. (12.1mb)
Needed if you have a device in the device manager with Error Code: 28. Viewing the properties of it in the last tab and cycling through the dropdown you will find a string like this “ACPI\NTN0530\4&28EE259&0″ with NTN0530 being the easiest thing to identify.
Hope this works.