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root hub

About this tag
A root hub is the top-level USB hub integrated into a computer's host controller, managing all downstream USB ports and devices. Discussions on WindowsForum.com cover issues where all USB ports share a single root hub, leading to performance or connectivity problems. Users report high CPU usage when USB audio devices are connected through a root hub, intermittent USB 3 boot failures, and error code 19 in Device Manager indicating corrupted registry configuration for USB Root Hubs. Troubleshooting includes checking power management settings, updating drivers, and resolving registry errors. The tag also addresses saving root hub settings across reboots.
  1. A

    Windows 7 All USB Ports are on one Root Hub

  2. seekermeister

    Windows 7 Intermittent USB 3 Issues Causing Boot Problems and Mouse Malfunction on Windows

    It took about 6 tries to boot to Windows a little while ago. First try - couldn't get the login field to open for a password. second try - got the password entered, but after a prolong period, it popped an error simply saying access denied. third try - booted into safe mode okay. fourth and...
    • seekermeister
    • Thread
    • access denied bios boot issues connectivity connectors device manager drivers error message hardware motherboard mouse issues root hub safe mode system issues tech support troubleshooting usb 3.0 user interface windows
    • Replies: 59
    • Forum: Windows Hardware
  3. News

    There is high CPU usage when using a USB audio device connected to a USB 2.0 EHCI host controller

    Fixes an issue in which a computer has high CPU usage when a full-speed USB 2.0 audio device is connected to a high-speed hub which is connected to the root hub or a high speed USB audio device is used. More...
    • News
    • Thread
    • audio cpu usage device driver ehci controller microsoft performance root hub speed support troubleshooting usb audio
    • Replies: 0
    • Forum: Knowledge Base (KB)
  4. J

    Windows 7 USB Root Hub and Code 19

    I recently upgraded from Vista 32-bit to Windows 7 32-bit and have run into an issue with my USB ports. Basically, if I plug any device (notably a USB pen drive) which requires automatic installation by windows, all of the devices attached to USB ports go dead. In the device manager, all of the...
    • Jtcgh
    • Thread
    • code 19 configuration device manager driver installation driver issues drivers error codes external devices gigabyte hardware issues installation issues pen drive registry error root hub safe mode troubleshooting usb vista upgrade windows 7
    • Replies: 9
    • Forum: Windows Help and Support
  5. R

    Windows Vista how to save settings in USB Root Hub

    Here's a skill testing question. For whatever reason, let's say I uncheck the check marks in the USB Root Hub (in Device Manager). I reboot, but they're right back there. Let's reverse the scenario ... let's say they're presently empty and I go to put the check marks in there. Upon rebooting...
    • RIPSNORT
    • Thread
    • check marks configuration device manager reboot root hub settings troubleshooting usb windows
    • Replies: 3
    • Forum: Windows Help and Support
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