For some reason this laptop doesn't want to stay connected to the Internet. I have to restart the DHCP client service every time to fix the connection problem.
I didn't have to usually do this. I'm not sure if these problems are connected, but the sound also disconnects itself and I have to enable it back, but everything that was using audio has to be restarted in order to hear it, even the browser. There are no external speakers and I didn't install any new software.
My laptop is an XPS M1530, running Windows Vista.