my acer aspire 7000 laptop will not reboot. the power died so i plugged in the charger, switched on the laptop and it took me to the windows start up page. i selected start windows normally but it didnt and took me back to the start up page, i have tried all the different options, safe mode etc etc but it just keeps taking me back to the same place.. i have ran the memory diagnostics which does not report any problems, i do not have a recovery disk for it. it is running on vista home premium. does anyone have any idea what i can do or what is wrong. thanks