I have just reinstalled xp home edition, but

Hi all, i have recently reinstalled xp home edition, on my pc ( msi board is all i no!) but in device manager i have yellow ? over the , sm bus controller, unknown device,video controller & video controller (vga compatable), i am no wiz , i only know the basics & this is really confusing me, does anybogy no what the problem is? or if i need to download drivers, if so where from? much appreciated!