Several times a month, I will be unable to connect to the internet. I'll have no problem one minute, and then suddenly I'm offline. When I contact my IP (Comcast), I am told that there are no problems with my modem, and that there are no outtages in my area. I will unplug my router (to which I'm connected by a Linksys wireless adapter) for 30 seconds, and then plug it back in to reset it. (I was told to do this by Comcast). This does not solve the problem. My internet connection may come back within a few minutes on its own, or it will be down for an entire day before returning.
I run all my spyware programs regularly along with Norton AV, but this doesn't seem to affect the internet problem.
Is there anything else I can check when this occurs?
Windows XP home
Service Pack 1 (I had too many problems with service pack 2)
HP Pavillion a300n