|Sorry but I must disagree with #2 about using "driver genius" (or any similar miracle driver finders you find on the net). Even when they are not scams they have certainly been responsible for messing things up. You get your drivers from the computer manufacturer.|
Please explain what you mean by "All of the the other devices have a yellow question mark". Do you really mean all of them (such as display and sound drivers), or do you just mean Network Devices? If you mean the lot, then you should be experiencing all sorts of problems, not just issues about getting on line.
I might be best to do System Restore, choosing a date/time before this happened.
Always pop back and let us know the outcome - thanks