Can you help me figure out what is wrong with my WiFi network connection?

For the past month or so my wifi will just kick me off of my wireless network and then when I try to log back on my computer cannot even find my wireless network. Then all of sudden I am back on wifi. Sometimes it takes 5 minutes to get back on sometimes it takes an hour. Sometimes, if I turn my computer off and turn it back on it will reconnect, but not always.

I know the issue is not with my Airport. While I’m having all these issues with the wifi on my computer my phone has no problems with the connection.