XP Pro error line 1773

Win 98se. 120gb Western Digital drive. 512mb ram. Formated drive with Western
Digital utility disk that came with drive. For some reason, I cannot do a
"clean" install so I re-installed 98se with no problems, then started
installing XP Pro over Win 98se. I'm trying the "Upgrade" selection first
(although I do not want to). I get this error message: "Unexpected error (0)
occured at line 1773 in D:\xpsprtm\boot\setup\arcdisp.c."
This happens on both setup attemps ("clean" or "Upgrade") after it goes to
blue setup screen and checks my computer. This is a full Retail version not
upgrade package. $299.95. I can boot and run to 98se ok with no problems.
Other diagnostic programs show no hardware or memory defects. Reloaded K7s5a
motherboard disk and all related updated drivers. Whats up.