Computers!

I'm having an issue with my wireless connection/network.  I use a wireless connection on my home network.  Lately I can't seem to keep it logged in. I'll connect just fine then in a few minutes or an hour or so, I get a error about no connection.  This is extremely frustrating!!! I even bought a new router thinking that would help--it didn't.  I'm ready to throw the computer out the window.