hi,you needed to download the update from the microsoft named : Q312370_WXP_SP1_x86_ENU.exe , to resolve the problem of usb. alternatively if you are using plain xp it is highly recommonded that you should download the SP1 and SP2 of windows xp.if you are planning for these two u will not need the usb driver fix that i've said.you can also slipstream your xp with the SP1 and SP2 and remove the problem permanantly,for slipstreaming (integrating Sp1 and then SP2 in the plain xp) you can use nlite, or bart's pebuilder software.or you can do it by the inbuilt utility of xp also , that is in the DOS command.also check the motherboard inf driver has been installed or not.