Presario 2100 and Netgear 11g router

Hi everyone, I'm new here.
I have been having an issue that I can't get figured out and it's driving me insane. I got my laptop about 6 weeks ago, plugged it in, and wham - it found my 11b router. Yay! Internet worked great for several days (if my memory serves me right) - a few days into it (after windows updates, program installs, etc) it seems my connection is dropping anywhere from 12-30 times an hour. Today I swear, I timed it (using Trilian to "watch" when I disconnect) and it went out every two minutes. Comcast has pinged my modem and told me I was having issues, I get a new modem - seems to have fixed the issue for a day. Day 2, bam, back to the disconnects, 3-4 times an hour escalating to 5-6, and so forth, to today we have once every 2 minutes. I don't get a message saying "No wireless networks are available", I don't have to "reconnect" or "repair" my connection to my router - Ijust have to wait, and it will straighten out, but these hiccups are going to drive me nuts.
I have talked to comcast, and they now tell me "if we can't find a problem we can't fix it" seeing as they can't find anything wrong with the wired computer. When I connect the cable directly to it, w/o router, I still have the disconnects - not near as often. I have read something about rebooting the router, and recreating a connection, but I'm not sure how to do that. Does ANYONE have any idea what this could be? I have disabled the Wireless zero configuration in lieu of the software/driver update for my integrated WAN card... (that helped for about a half a day)
Anyone? Please help me. lol

thanks
Bekktek
bekktek@hotmail.com

By the way, I have since gotten a new Netgear 802.11g router (thinking maybe the B version was causing the problem, and everything found everything else - the ethernet cable is new, the entire router is new - everything is brand new - same problem with the new router. This tells me it's not the router - I have pinged my main computer and the router and I get 0% packet loss. Help!

 

if you go to network devices, right click on your wireless connection go to properties, I believe the second or third tab will have an option for some sort of authentication, turn that off. Also on the last tab make sure the firewall in unchecked. Let me know if either works.