Problème avec windows vista

Bonjour, j'ai un problème avec windows vista, j'ouvre mon ordi et quelques instants après l'écrant devien bleu et c'est écrit sa :

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

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 probems continue, disable or remove any newly installed hardware or software. Disable BIOS memory option 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 option, and then
select safe Mode.
Technical information :
*** STOP: 0x0000C1F5 (0x00000000, 0x00000000, 0x00000000, 0x00000000)