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event id 1012

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Event ID 1012 is a DNS Client error logged in Windows System event logs when the DNS Client service encounters a problem processing the HOSTS file. On WindowsForum.com, users report this error after manually editing the HOSTS file to block advertisements or redirect domains. The error typically indicates that the HOSTS file contains invalid entries, has incorrect formatting, or exceeds size limits, causing the DNS Client service to fail during startup. Troubleshooting steps discussed include checking the HOSTS file for syntax errors, ensuring no duplicate entries, verifying file permissions, and clearing the DNS cache. The error can prevent custom HOSTS-based blocking from working, leading to ads appearing despite the file being present.
  1. J

    Windows 7 HOSTS file not working; DNS Client Event ID 1012

    Hi there, For quite some time I've been using the mvps HOSTS file to block advertisements and similar with great success. However, after recently adding some additional entries to the list, the HOSTS file has completely stopped functioning (I now see advertisements everywhere - quite...
    • Jawzper
    • Thread
    • ad blocker dns client error event id 1012 hosts file network issues permissions system32 troubleshooting windows 7
    • Replies: 3
    • Forum: Windows Help and Support
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