I think it is like any system, occassionally needs a tweak and protection from the actual user. My business partner habitually keeps over 2500 e mails, none of which are filed and some of which are quite large (film clips etc). This makes his computer unstable and he is constantly calling in the IT guys who make a fortune out of him. I have spent £200.00 in the last four years on my office machine because I try and look after it. Its like they say about cars - The most dangerous bit is the nut that holds the wheel.