BSOD after boot splash screen 0x1000007E

[CarbonAssassin]

So i recently purchased a graphics card and fitted it. Installed all the drivers and the pc had been working fine for a week. One morning i go to turn it on and i get a bsod error with 0x1000007E. This happens every time i boot. I was able to go into safe mode, Uninstalled graphics and soundcard drivers aswell as uninstalling avast. Still the errors. Now i cant even boot into safe mode without it BSOD or freezing. I've run system repair, Run chkdsk /r and still no luck. I have no idea what the cause is! I get the same error with one of my 4gb sticks in. I've run memtest on them without errors so i have no idea!

 

[CarbonAssassin]

I'm also unable to run driver verifier.

 

[koolkat77]

The BSoD was caused by aswTdi.SYS (Avast!)
Are you sure your computer has no remnants of Avast! ?

Use Driver Sweeper ,look for any driver remnants of Avast! and remove them.

0: kd> lmvm aswTdi
start             end                 module name
fffff880`0302f000 fffff880`03041000   aswTdi   T (no symbols)           
    Loaded symbol image file: aswTdi.SYS
    Image path: \SystemRoot\System32\Drivers\aswTdi.SYS
    Image name: [COLOR="Magenta"]aswTdi.SYS[/COLOR]
    Timestamp:        Tue Aug 21 15:05:01 2012 (50334F3D)
    CheckSum:         0000F1F0
    ImageSize:        00012000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

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