Hey guys i need help BADLY!!!! every time i turn my dell inspirion laptop on it always says Stop:C000021a Fatal System Error system has shut down....
I honestly did some research and its a little hard to follow all of the other peoples directions due to the fact that i cant even get past the loading screen... so i turn on my laptop and its a black screen till it shows the windows vista loading thing then it just shows my mouse on a black screen and every time i put in the cds the other topics recommended it has the error... it started to run slower proior to the crash, I even ran macfree on it but it said nothing was wrong and so i woke up the next morning with the error... its just gotten really annoying trying to fix it on my own for 2 days straight... the help would be greatly appreciated.

After some quick Googling, I found this;

http://myitkb.net/windows-stop-error-codes/

Your error code is listed as the last one on this list, and it has alot of information to help fix it.

I don't use Vista myself, so I can't be of any more help.

Hope this resolves your problem!

thank you SOOOO much!!!!!!! you kick ass!!!

were you able to resolve it? im having the same problem now!

The link provided earlier does not work.

I did figure out what was causing the error message in my laptop.
Apparently it is the display driver.
I went into 'safe mode', then 'control panel', then 'device manager', went to my 'display adapters' and uninstall the driver.

The error message went away when i restarted the computer, but now my display is stuck on 800x600 pixels, but  I want to be able to see my computer in 1280x768.

What do I do? Everytime I install the latest driver, the error message comes up again.

My display driver is ATI Radeon HD 4570.

(Windows Vista 32-bit)