I'm getting messages saying I'm unable to update some programs (e.g., Curse Client) or install other programs (e.g., Spyware S&D, Norton AV from Comcast: it's DL'd from their site) because they are unable to connect to the internet. I'm not sure what is causing this problem, I'm able to access the internet (wireless) with no problems through Firefox, IE, Warcraft, updating other programs. etc., but sometimes I'm unable to. I've disabled my firewall and AV and neither of those steps helped (I enabled immediately after). I'd appreciate some help or an idea of what is going on, as some of my programs are becoming out of date.

Thanks so much,
MJ