All of the sudden my home wireless internet is having lots of problems. When I connect on my laptop, I get a little exclamation mark in a yellow triangle next to the network. It also works fine for a little while, and then disconnects. I've run the "diagnose" tool, and it tells me that it fixes something about the default gateway, but the problem persists. I tried calling Comcast because we rent our router from them, but of course they were absolutely no help. Any suggestions or ideas would be greatly appreciated, this is driving me crazy because I work from home and really really need a good internet connection!