I need to know how to fix my PC it says that there are no wireless conections available. I have a router hooked to the main computer but it is not showing that anything is even hooked up. I don't know what happened because it was working fine before. How do I fix this?

Some more details about your setup might help. Have you tried calling the tech support for the router mfg?

Are you using a laptop or desktop? If it's laptop, may be by mistake you turn off the radio, can you give me the brand of it and the model?

Was the a connection before or are you trying to set it up yourself?