I have never defragged an XP NTFS system and its been working continuously 24/7 as a chat room for 2 years now, but as Zim said its your machine.
Hi Snake, hers the deal here, when your on a p2p network you must decide what you want to share,if your worried or not comfortable sharing certain items then dont, as we will not be there to hold your hand in court.
That said, looking at the statistics for those using p2p, against those being sued it does actually come out at about just under a million to one chance anyone would bother with you, more where I,m from
(in all the time I have been on winmx I only know of 7 folks prosecuted and many of those used other p2p at the same time )
I share freeware applications along with other items on the network because thats what p2p is about not just copyrighted items as the recording industries claim, this is your choice and its for you alone to decide.