c000021a blue screen

i am getting a blue screen on startup that says fatal system error i have tried last known good config and almost eveerything else this is the spec of my laptop and i am running windows 7 pro 64bit if it makes a diffrence this version is downloaded of the microsoft store but i do have the disk
Satellite L300D-13S

Part Number : PSLC8E-02P013EN

Key Features

- AMD Turion X2 Dual-Core Mobile Processor
- DVD-RW SuperMulti drive (Double Layer)
- 4072 MB (2048+ 1024) DDR RAM (800MHz)
- 15.4" Widescreen TruBrite® XGA (1280 x 800) High Brightness display


Essential Member
Hello and welcome to the windows7forums,'

Was thus a:clean; ind tall or an upgrade?

Cab you get into Windows at all?

Clean install

This was a clean install ,I can get into windows if I keep trying about 8 times and then leave it in hibernate


Essential Member
How long does It stay up before it hibernates and why don't you just turn off hibernation temporarily?

hibernation over shutdown

i use hibernation instead of shutdown as this will not blue screen me on start-up , i think its soming todo with my ati radeon drivers but when i try to install them i get to the bit where you select install or uninstall select install and it just dissapears , i think this is the problem , i downloaded them for my machine with the win 7 64bit operating system from toshiba


Essential Member
Did you try uninstalling the ATI drivers?

First look in Control Pane > Programs abs Features.

If it's;s not there, go yo Device Manager and uninstall them there.

Make sure you have your new driver downloads or Windows might install it;s own WDDM driver.


i've already tried the screen just becomes small it does nt fix the error


Essential Member
Go to Start > Run, and type cmd. Now type sfc /scannow

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