I max out all 2 three years old computer's MB, but want to change OS to XP Pro. from Win. 98 SE. What do I do apart from buying a new machine ?. A new motherboard is the only option ?. Also will the following specs. be able to handle XP Pro and Tradestation 7 ?. Sony Vaio PCV R547DS with 600 mhz P3, 27 GB ATA hard drive, 128 MB PC 100 SDRAM, max out to 256. And Sony Vaio PCG F390 notebook with 500 mhz P3, 12 GB hard drive, 128 MB SDRAM, max out to 256. I know clean install is the way to go in terms of upgrade, how do I get the hard drive clean and fresh ?. Is there a software I can buy or is pure manual ?. Any help will be appreciated. Thanks. Jonas.