Hello, i have a problem w/ my extensa 4230 laptop. booting is upto windows vista logo only and returned back to the choice of safe mode, return to best know config, windows boot normally & others...then after 30 seconds of counting it return back again.. please help me.. i am planing to recover it by i lost my recovery cd. what fubckey key i used if i decided to reformat may laptop.. please helpp...