it main jo bhi usb window k teriqy the wo meny try key pur subh main maslah hai aik wintoflash waly terqy sirf aik dafa window instal hity hai or dusra dos wala wo 4,5 dafa instal hojati hai pur phir wo missing file ka eror deta hai koe dusra teriqa jis sy bharosa ho k is sy window instal hoti rahy gi