Windows 7: BSOD/Backup not working

Hey I'm really not the best at computers and a while ago I got a blue screen while watching a video on windows media player, but before that my screen went black for a second and a little window poped up in the lower right corner and said something like "your display stopped working but windows fixed it". After the first blue screen I now tend to get them at random nothing really seems to set it off that I can tell. I can play a game for hours get off the game open my pictures and bamb blue screen.

My computer does a weekly backup copy of my C drive into my G: drive
for some reason it gives me this now this also started happing after the blue screen.
"a shadow copy could not be created. Please check 'VSS' and "SPP" application event logs for more information. Details: A volume Shadow Copy Service component encountered an unexpected error. Check the Application log for more information.Backup error code: 0x81000019"
read up on that code cant seem to find a fix.

I tried the SFC /SCANNOW Command as I saw on another forum it gave me this as it couldn't fix
"Cannot repair member file [l:18{9}]"mfc90.dll" of Microsoft.VC90.MFC, Version = 9.0.30729.6161, pA = PROCESSOR_ARCHITECTURE_INTEL (0), Culture neutral, VersionScope neutral, PublicKeyToken = {l:8 b:1fc8b3b9a1e18e3b}, Type = [l:10{5}]"win32", TypeName neutral, PublicKey neutral in the store, hash mismatch"



I have no idea what that means, and here are my computers specs if anyone can help me out Id really appreciate it.

Operating System Version:
Windows 7 (64 bit)
Video Card: Driver: NVIDIA GeForce GTX 460
DirectX Driver Name: nvd3dum.dll
Driver Version: 8.17.12.7533
DirectX Driver Version: 8.17.12.7533
DirectX Card: NVIDIA GeForce GTX 460

Motherboard: [SLI] Gigabyte GA-P67A-UD4-B3

Processor Intel® Core™ i7-2600K Processor (4x 3.40GHz/8MB L3 Cache)

Sorry if thats not the specs needed. Like I said I'm not the best at computers.

Specs here forgot to upload em

Got another blue screen today randomly

Problem signature:
Problem Event Name: BlueScreen
OS Version: 6.1.7601.2.1.0.768.3
Locale ID: 1033

Additional information about the problem:
BCCode: 1a
BCP1: 0000000000005003
BCP2: FFFFF70001080000
BCP3: 000000000001A017
BCP4: 0001A0190003400E
OS Version: 6_1_7601
Service Pack: 1_0
Product: 768_1

Files that help describe the problem:
C:\Windows\Minidump\070611-23961-01.dmp
C:\Users\Kitty\AppData\Local\Temp\WER-45989-0.sysdata.xml

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C:\Windows\system32\en-US\erofflps.txt

If anyone can help me Id really love it I cant figure out whats wrong with it.