Help! STOP:c000021a Fatal system error....status 0xc0000006

By shazbel
Nov 12, 2007
  1. Hi, Need help with this error message. Blue screen appears on start up:

    STOP:c000021a Fatal system error The windows logon process system process terminated unexpectedly with a status 0xc0000006
    (oxoooooooo oxoooooooo)
    The system has been shut down

    Tried booting from last known good configuration, safe mode but still get the same message. Searched the internet but no luck with the status code. Am running XP home.

  2. Route44

    Route44 TechSpot Ambassador Posts: 11,961   +69

    Do you have GoBack on your computer? It's a utility used by Norton to create and manage backups on the fly, ie in the background.

    The C021a Stop Error can sometimes be caused by GoBack.

    Have a look at this Microsoft KB article;
  3. shazbel

    shazbel TS Rookie Topic Starter

    No, I dont have goback.
  4. Route44

    Route44 TechSpot Ambassador Posts: 11,961   +69

    But do you have Norton?
  5. shazbel

    shazbel TS Rookie Topic Starter

    No, I dont use Norton
  6. Route44

    Route44 TechSpot Ambassador Posts: 11,961   +69

    Here is one person's discovery:

    Hotfix number 890859 is the culprit. Another tech in Microsoft's own newsgroup has documented it as well. But I can't find any evidence that Microsoft itself has acknowledged it. The easier solution than my method of reinstalling is outlined here.

    So put out the word - turn off Automatic Updates, install updates manually and do not install # 890859. You may need to check the "hide this update" box so it doesn't get included again in future update cycles.

    Also, you could load your install disk and do a repair. On further investigation it appears many people have had this error.
  7. shazbel

    shazbel TS Rookie Topic Starter

    Thanks for your reply, Im currently running a repair on it now. Fingers crossed.
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