hello, try booting into Safe Mode.
keep pressing the F8 key as the laptop boots.
if you are shown a scree for choosing where to boot (hard disk, cdrom, etc) -- choose to boot from the hard disk.
still keep pressing on the F8 button.
you will then be presented with the option to boot into safe mode.
select "boot from last known good configuration".
let us know if this works, goodluck