Found new hardware error message?

Which operating system are you using? If you right click on My Computer or Computer then select Manage you can get to the Hardware Manager and see what has a little yellow exclamation point next to it. That might give a better idea of what it’s looking for.

I tried that and there is a yellow exclamation point but it only says “unknown devices.”

I’m using Windows Vista.

Your problem is that you are using Windows Vista :/