I have a PII 300Mhz running NT4 but only with Service Pack 1 installed. I have looked on Microsoft's web site for further releases and found only Service Pack 3 which I have downloaded. Can anybody advise me as to whether I need to install Service Pack 2 before Service Pack 3 ? I am, unless anybody can advise me otherwise, happy to continue with SP1, but I have no defrag utility as yet, and whilst trying to install Diskeeper the setup program strongly recommended I installed at least SP2. Thanks in anticipation ! Paul Burgess You can e-mail me personally at [log in to unmask]