subject: "Stop c000021a Fatal Error" Cannot Start Vista - How To Fix This Annoying Error For Good [print this page] The STOP: c000021a error is continually showing on many Visa computers, and is mainly caused by your computer's inability to load either "WinLogon.exe" or "Crss.exe" - two vital files that Windows requires to use to login. Although the Stop c000021a error is an annoying problem, the good news is that it's actually relatively straightforward to fix if you know what's causing the issue. This tutorial is going to show you how to resolve the Stop c000021a error on your Vista PC.
The fatal system error "Stop c000021a" will often show on Vista like this:
STOP: c000021a {Fatal System Error}
The Windows Logon Process system process terminated unexpectedly with a status of 0xc0000034 (000000000 00000000)
The system has been shutdown.
The error itself is caused by Vista not opening two essential programs which are required by your PC to run - WinLogon.exe and Crss.exe. Typical causes of this error include the likes of your computer being unable to correctly read the files it requires, an outdated set of drivers for your system or the failed installation of the latest Windows Vista service pack. If you want to fix theStop c000021a error in Windows Vista, you need to be able to repair the various parts of your system which are leading it to show.
The first step to fixing the VistaStop c000021a problem is to first open the "DrWatson" program. This is a diagnostic tool which Microsoft included in Windows Vista to help people determine exactly what was wrong with their PC. By using this program, you'll be able to see exactly what the problem with your computer is, and should be able to resolve it quickly and easily.
On top of that, you should also use what's known as a "registry cleaner" program to fix the various errors your computer might have inside the "registry" of your PC. The registry is a central database which stores all the files, settings and options that Windows uses to run, and is continually being used to help your computer "remember" a lot of the settings it needs, such as the Desktop Wallpaper and your most recent emails. Although the registry is one of the most important parts of your computer, it's continually causing a huge number of problems for Vista as well, including theStop c000021a error. Fortunately, registry errors are easy to fix if you are able to use a registry cleaner program to repair them.
