System Freeze

Background:- Machine with fresh WIN XP install. Latest SP’s etc. CPU Cooling is fine.

Problem. I xcan use the machine quiter happily for some time – browsing the web, running local apps etc. However it locks up without warning and completely freezes. Ctrl-Alt-Del has no effect. Onlt answer is to reset.

When this happens seems to be when performing a download. This download could be anything from a toolbar update to a specific file. The machine will typically freeze the moment the download starts.

Any ideas?