Attached Link: http://www.microsoft.com/windowsxp/pro/howtobuy/choosing2.asp

AnthonyAppleyard: I've pasted a link that will describe the differences. I have XP Pro on my Poser Machine and XP Home on a work machine (A Compaq Presario). Remote networking can be done in XPPro but not XPHome. Not much of an issue for Poser. XP Pro has some advanced management features that XP Home does not. Also not a big deal for using Poser. The multi-processor support of XP Pro is a plus, but for Poser is probably not going to help much. I think either version would be a vast improvement over Windows 98. The posts here suggest that XP Home works just as well with P5 as XP Pro. Now.....I'm going to give you my personal opinion on upgrading an old computer to XP. If your computer is older generation hardware and does not have "at least" 512 mb of ram....don't do it. Also, IMHO, you should have at least a 1.5 ghz PIV processor. Ignore what it says on that XP box. In my opinion Microsoft, like CL, lists totally unrealistic "minimum requirements" on their product boxes. If you have a reasonably fast processor, a decent amount of ram, and a large harddrive (say 20 Gig) do a clean install (remove Windows 98....f-disk) and start over. If you don't know how to do this, get someone to do it who has done it before. XP is a totally different OS from 9X. For example, it does not use the FAT32 file system, but rather NTFS, the set up for upgrading and registering is totally different and it handles memory differently. All vestiges of 9x need to go. If you can afford it, a new computer would be the better option. Poser 5 needs (in this order), lots of Ram (1 gig seems the best), a fast processor (1.5-2 ghz PIV seems the best). Video cards don't matter for Poser 5 (but will if you ever decide to use DAZ Studio!). The harddrive is only important in terms of space.....as you know, P5 takes up a lot of space and so does XP :) Also, if you decide to go with a new machine, get a decent power supply and a well vented case. I have a 300 Watt power system and lots of vents on the case of my current machine and it works fine. I also have good fans.....not those plastic, bearingless crappers that burn out once a year and can put your system at risk.