Thanks guys. It's a pretty old laptop, which has given me trouble in the past, and which I now plan to use just for general web use, for as long as it holds out. I no longer keep anything of value on it at all.
I googled the problem and found that actually hitting the laptop can help solve this problem. It has actually worked, but I suspect that there may be a long term connection problem, which I will inspect asap.
Joebeard, given that I reinstalled windows just a couple of days ago, is it still possible that the problem could be in the partition, MBR, or the common boot files?
Thanks again.