For sometime now, my wireless system has being acting up, again. My computer will not stay connected to the network. I"m thinking that the wireless card might be bad, but I'd like to rule that out. How long do wireless cards generally last because if its bad, I would be on my second replacement. So what else could be causing this problem? Here is what i've done so far:

- unplugged router and modem
- restarted comp ( I was told this "refreshes" the connection?)
- moved computer and network hardware to different locations
- tweaked antenna's for better signal


Card: linksys model wmp54gs
modem: linksys befcmu10
Router: " " w/ SRX400
Comcast