Hi,Zahid,normaly if u wan to re install the window,yr data should be lose,mayb u can search in google.mayb there have some window mobile version suitable for yr phone. if yr phone were functon late pro,u can try to press the button of MEMO and CAMERA button (press hold) then press the Riset button. yr phone will b turn in blank scren,wait awhile will show in Dos mode,there have some select for let u choose function to re install yr window or other. try it,mayb can work for u :)