Remote Call Procedure termination

I have a pentium 3, 1.1GHz, 240MB ram, 30GB laptop running on windows XP home editiion. My problem is anytime I connect to the internet using dial-up, after about 3-5 minutes I get a message saying that the Remote Call procedure terminated unexpectedly and that the system is automaically shutting down within a minute. It also says the shut down process was initiated by NT/SYSTEM. This prevents me from connecting to the internet with the laptop.