I have to reconnect every 5 minutes

[mrmksm]

Had similar problem with dell inspiron 2200, lost WiFi when I updated, each time. Found this on a post. On a Linux lite, while connected by hard wired for internet, click "Menu" - "system" - "install/remove software". Once in, search for "firmware-b43-installer", check it to "mark for installation", then click "apply. Disconnect hard wire, should be wireless! It worked instantly for me.
Hope that works for ya also. Good Luck