¡¿Ayuda pantalla azul?!

Hola, he tenido un problema mientras usaba mi ordenador, apareció una pantalla azul y se reinició sólo. He utilizado el programa BlueScreenViewer, y al parecer esto es lo que decía la pantalla azul:

A problem has been detected and Windows has been shut down to prevent damage
to your computer.

The problem seems to be caused by the following file: win32k.sys

KERNEL_MODE_EXCEPTION_NOT_HANDLED

If this is the first time you've seen this stop error screen,
restart your computer. If this screen appears again, follow
these steps:

Check to make sure any new hardware or software is properly installed.
If this is a new installation, ask your hardware or software manufacturer
for any Windows updates you might need.

If problems continue, disable or remove any newly installed hardware
or software. Disable BIOS memory options such as caching or shadowing.
If you need to use safe mode to remove or disable components, restart
your computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.

Technical Information:

• • • STOP: 0x1000008e (0xc0000005, 0xbf85fc9e, 0x9fd9cae4, 0x00000000)
    • win32k.sys - Address 0xbf85fc9e base at 0xbf800000 DateStamp 0x52f43e77

¿A qué se debe el problema? ¿Es algo malo que aparezca esto? ¿Cómo puedo solucionarlo?