Difference between .ost and .pst files in Outlook 2016/2013/2010/2007

Microsoft Outlook, or just Outlook , is a personal information manager of Microsoft , available as part of the suite of Microsoft Office. It is mainly an email client application that stores all kinds of data, for example emails, attachments, tasks and more in OST and PST file format. Here this post has brief information about MS Outlook Outlook OST and PST file format, what are the main ones differences between the file format OST and PST .

USB device not recognized

Note: The solutions below are also applicable to correct:

  • USB device not recognized
  • USB device not recognized in Device Manager
  • The USB device driver software did not install correctly
  • Windows has stopped this device because it has reported problems (Code 43)
  • Windows cannot stop your “generic volume” device because a program is still using it.
  • One of the USB devices connected to this computer is not working properly and is not recognized by Windows.
  • A simple reboot of the system can be helpful. Just remove your USB device, restart your Windows computer, then plug your USB device back in to see if it works or not.
  • Also, unplug all other USB accessories, restart the computer, and then try to check whether the USB works or not.
  • For some users, if the USB device has not been ejected correctly before, it may cause this error on the next connection. In this cause, please connect your device to a different PC, let it load the necessary drivers on that system, and then eject properly. Plug the USB back into your computer and check.
  • Also, try plugging the USB device into a different USB port especially. Use the USB port on the back of the computers, this is very helpful for some users who troubleshoot the problem of USB not recognized . If you keep getting the same solution below fallow.
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Reinstall USB device drivers

Most of the times the corrupted USB driver can cause this problem from device not recognized Especially after Windows 10 update. Updating or reinstalling the USB driver to the latest version will help to fix this.

Update the USB device driver

  • Press windows + x and select Device Manager,
  • Expand Universal Serial Bus Controllers at the bottom and find the Unknown Device.
  • Right-click on the problem USB (it should be marked with a yellow exclamation mark), then right-click and click » Update driver software ». «
  • Then let Windows automatically find and update that driver by selecting Search automatically for updated driver software.
  • Windows automatically checks and installs the latest driver if it is available.
  • Now remove the USB device just restart Windows
  • Reconnect USB device verification worked.
  • Reinstall the USB device driver

    If updating the USB driver did not fix the problem, try reinstalling the USB device driver by following the steps below.

    • Again open the device manager,
    • Expand Universal Serial Bus Controllers
    • find the unknown device, right click and select uninstall.
    • Confirm by checking the box labeled Delete the driver software for this device.
    • Restart Windows and reconnect the USB device, check this helps

    Finally, if none of the above steps worked, you need to check your motherboard chipset drivers. Identify the make and model of the motherboard, visit the manufacturer’s website, and search for the latest chipset driver. Install the latest drivers and restart your computer.

    Change USB root hub settings

    If the above method does not fix the change, change the USB root hub setting by unchecking the Allow the computer to turn off this device to save power option will help fix the problem.

    • Again open the device manager using the keyboard shortcut Windows + X
    • Then expand Universal Serial Bus Controllers at the bottom,
    • Find the USB Root Hub option, right click on it and select properties.
    • A new pop-up window will open to move to the tab Power management
    • Here uncheck Allow the computer to turn off this device to save power .
    • Click OK to save the changes.
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    Note: If you have more USB root hubs, you need to repeat this operation a couple of times.

    Change USB Selective Suspend Settings

    Also changing the USB selective suspend setting in the power options will help to fix USB Device Unrecognized Error on Windows 10 computer.

    • Press Windows key + type R powercfg.cpl and ok to open the Power Options window.
    • Click on Change plan settings in your currently selected power plan,
    • Then click Change advanced power settings.
    • A new pop-up window will open here spend the USB settings
    • Then again Expand the USB selective suspend setting As it’s shown in the following.
    • Here disable battery and plug-in settings.
    • Then click Apply and restart your PC.

    Disable fast startup

    Some of the Windows users are reporting that after disabling the Windows 10 fast startup feature in the power option, the USB device issue is not recognized.

    • Control panel open
    • Find and select power options,
    • On the left side, click Choose what the power button does,
    • Then click Change settings that are currently unavailable.
    • Here uncheck Enable Quick Start As shown below in the picture and press Save Changes.
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    Registry Adjustment to Fix Device Not Recognized Error

    If all the above methods do not fix the USB device not recognized error, then we need to do some advanced settings to fix this problem.

    • First connect the problem device, then open Device Manager
    • Now expand universal serial bus controllers
    • Right click on the yellow triangle marked as USB device causing the problem and select properties.
    • In the Device property, go to the Details tab.
    • Then, from the Property drop-down menu, select Device Instance Path.
    • And in the Value section, highlight the value and right click on it, select Copy.

    For example: as shown below, my device instance path is USB VID_054C and PID_05BA CB00000000005C.

    Tweak in Windows registry editor

    After copying the path of the device instance, open the Windows registry editor

    Press Windows + R, type regedit and ok

    Then navigate to the next key.

    HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Enum < Device instance path > Device parameters

    Note Route of the device instance: USB VID_054C and PID_05BA CB00000000005C (The option highlighted is Device Instance Path). The device instance path may be different.

    So for me the log path is:

    HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Enum USB VID_054C & PID_05BA Device parameters.

    • Here select the registry key of Device Parameters
    • In the middle pane, right-click New> DWORD Value and name it EnhancedPowerManagementEnabled .
    • Again, double click on it and the value field set 0.
    • click OK and close Registry Editor.
    • Now remove the USB stick and just restart the windows.
    • The next time you connect the device, this will work without any error.

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