thanks patio ...but donot forget ..My processor : Intel Celeron 2.40 GHZ .and Intel Celeron dosn't support Hyper-Threading Technology , then the default options here for my motherboard accept any windows version , so I think with Chinese windows version and harddisk problem in the first maked my pc can't accept the english windows ,, I begining repair the problam when I discovered the Chinese windows is xp sp1 , and return to motherboard manual to know what window was recommended for it ,Just need another days to test another windows as Vista , maybe when my harddisk is stability and good performance.