Recovery will depend on the error that has caused this situation. In some cases a simple reboot will work. In others,...
a different driver or even new hardware will be required. It may also not be possible. For specific help troubleshooting such conditions, more information is required, and it is impractical to try to diagnose through a help list like this.
Here are some articles that may help you get started:
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.