vista x64

my computer has started giving me the blue screen of death.
it is saying stop:
0x0000000A
0x000009850000007E
0x00000000000000002
0x00000000000000001
0xFFFFF8000246A443

PROBLEM EVENT NAME BlueSceen
OS Version: 6.0.6002.2.2.0.768.3
Locale ID: 1033