You could try discharging all the volatile memory and static. Take out the battery and unplug the charger. After that press and hold in the power button for at least half a minute.
When you reboot your computer, press F11/it might be the F8-depends on the model you have/ when you see the prompt text on the bottom of the screen when it gets to the POST screen.
You can also restart the laptop and keep pressing F11 repeatedly until the Windows system restore process starts and shows you the menu to choose from.
Choose the Non-Destructive System Restore - This recovers the operating system, all programs, and drivers that were installed by default. Any files currently on the computer should not be damaged by this process.
It would be good if you get a system repair disk and try with it.