Help!! I have a Presario PIII 650 with 512 MBs of memory that constantly locks up after our IT department installed Win XP. The claim it is too old (it's less that 2 years) to work with XP and that it was designed only for ME--note sticker on the front. I don't buy it. I find it hard to believe that Microsoft XP is not backwards compatible with a 2 year old machine. Is anyone running W2k or XP on this laptop?? Thanks..R