Hmm... [img]tongue.gif[/img]
Are you sure the "before" and the "after" choppyness were exactly the same environment? Was the first XP installation a fresh one or an upgrade ? NTFS or FAT ? Are the VGA/sound drivers the same ?... Are they updated ?... Any anti-virus or b/g-running software installed ?...
Sorry for all these questions, but... if you were using the same type of XP installation before and after choppyness occured, I have no idea what caused it...
Cheers