I have been having problems with browsing the internet. After about half an hour of use, I will not be able to continue browsing the internet. It's as if I've been disconnected, but I can still ping google and use AIM. However, if I log out of AIM I cannot log back in. This problem persisted for a few weeks, went away for a couple weeks after that, and has now resurfaced. The only way that I have been able to regain browsing capabilities is by restarting the computer. The computer is connected to a router and is the only one in the network that has this problem (one is directly connected to the modem and the other is connected to the router wirelessly).