You cannot upgrade your Windows '98 PC to Windows XP. Windows XP requires much more than your Windows '98 PC has - at least 512 MB RAM, higher processor, etc. You would have to take Windows '98 completely off of your PC and reinstall Windows XP, which is not worth it, because Windows XP would most likely not work at all, or would work so slow, it wouldn't be worth it. I'm sure your software wouldn't work right, even if you could get XP to install. At this point, you have no choice, but to either keep using your Windows '98 PC or purchase a new PC with Windows XP on it, sorry. I have a computer business out of my home and go through this with many customers every day. Jan Scott In a message dated 9/20/2006 7:44:48 AM Central Standard Time, JHuecker@aol.com writes: I have Windows 98 SE - If I install Windows XP as an upgrade will it affect my other software programs, ie Family Tree Maker 2005, etc. I hesitate to buy another computer, I already have two and only use one on a regular basis. Also will it affect the modem I have for broadband? How much memory does one need for XP? Not a computer geek as you can tell. Thanks in advance. Joan/Ohio