Windows 7 bluescreens when screensaver stops?

hello there has been a few different occasions where my computer blue screens when i try to bring it back from a screen saver

I have a Custom Built computer
Nvidia GeForce GTX 470 with about 4gigs of video ram
with over 4gigs of video graphics available.

this is the details i got from the solution center:

Problem signature
Problem Event Name:    BlueScreen
OS Version:    6.1.7600.
Locale ID:    1033

Files that help describe the problem (some files may no longer be available)

 View a temporary copy of these files
Warning: If a virus or other security threat caused the problem, opening a copy of the files could harm your computer.

Extra information about the problem
BCCode:    124
BCP1:    0000000000000000
BCP2:    FFFFFA800B105028
BCP3:    00000000BE000000
BCP4:    0000000000800400
OS Version:    6_1_7600
Service Pack:    0_0
Product:    768_1

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