My computer keeps saying "One or more wireless networks are available" and then it shuts down the one I'm supposd to use. And because of that I cannot really play online games. The network keeps getting disconnected and then connected again. Right now its detecting three availabe networks. I've Linksys Wireless Adapter. Can somone help?

Have you tried removing the other two from the list? Life is more painless for those who are brainless.

When you are connecting have you configured your wifi card(s) to use the preferred access-point (the correct/preferred/your... wifi system) rather than one of the others - which are probably local (and belong to others) in your neighbourhood? There is usually an option within the wifi card control util to set which access-router to use. Also have you configured your access-router to allow only thos wifi deice you list therein to connect to "your" router? This is generally referred to as mac-filtering (or mac-address filtering). You create a list of mac addresses for all your wifi devices; then usually you have a few options - viz: only those listed are allowed to connect; or those listed are "not" allowed to connect; or anyone can connect (and logically the mac-list is redundant in that case). And also (ideally) hide the ssid (the router's name/identity). This prevents others from using "your" wifi service/router to get on-line. If they use it you may either find your download/upload rates etc. are poor; you may not be able to get on at all; you may get bumped off... You then tell each wifi device the name of your router as part of its config/setup details...

I tried removing the other networks from the list, but after a while they show up again. How can I permanently remove the other ones? Or should I uninstall the whole wireless thing, and install it again???? Can you guys write the steps of what to do, rather than the theory? Thanks.

You can't remove the other networks; the system (wifi cards) will find them... But you can tell each wifi device which one you wish to use. Much like a radio receiver; all the stations are there - but you select the one you want. And when using preset tuning buttons... you tell (programme) a given preset which station to tune to... Your wifi cards follow the saem ritual. If no-one does it before I get the chance to... later today (this evening my time), I will post you a few "how to links etc." that detail setting up the whole shibang... Meanwhile... have you read the instructions etc. that come with your Linksys wifi cards; and also similar that come with your router?