Update 2, well after following most of the advice the dcom errors seem to have stopped and am no longer getting lock ups or restarts.
Am still getting some minor hiccups i.e. can be browsing then all of sudden page cannot be displayed and i cannot disconnect my adsl connections from the sys tray icon by right clicking and choosing disconnect.
Also when this happens i am unable to access the task manager to see what is happening as i get a windows application error saying the application failed to initialise properly (oxc0000017)click on ok to terminate the application.
Usually a restart cures the problem and then can browse etc for hours without any further problems.
Event viewer is showing nothing unusual and i am getting more and more convinced this is down to the Bullguard firewall that comes shipped with mesh computers unless anyone has any other ideas.
