|No, that doesn't sound stupid. If you formatted your USB devices to work with Linux then they aren't going to work with Windows. |
I don't think that is your problem though. The USB controllers do not appear to be working correctly. That is what you are saying when you explain there is a yellow exclamation mark by them.
Below is a link to Dell for all the drivers for your model. There is no USB driver listed. You must be selecting the wrong Operating system. You could try to reinstall the chip set drivers from that link.
As I stated, you shouldn't need any special drivers for your USB controllers.