About this tag
The acmon error is associated with Windows update interruptions, particularly on Windows 7 systems. In one reported case, an accidental power-down during an update on an Asus laptop caused the system to boot only to a black or white wallpaper with a mouse pointer. Safe mode worked, but normal mode was unresponsive, and launching regedit via Task Manager triggered the acmon error. The error appears alongside system slowness and Task Manager failures. This suggests the acmon error may relate to corrupted system files or incomplete update processes, often requiring troubleshooting steps like system restore or repair installations.
  1. Retinal

    Windows 7 Interrupted Update Issue

    Thanks in advance for any help you may provide me. I accidentally powered down in the middle of the update process on my Windows 7 Service Pack 1 Asus laptop. Safe mode works. Normal mode does not. After logging in, after the “welcome” screen, I get either a black background or the default white...
    • Retinal
    • Thread
    • acmon error bios black screen laptop normal mode performance issues recovery safe mode service pack startup repair system repair system restore task manager troubleshooting update user interface windows 7
    • Replies: 1
    • Forum: Windows Help and Support