Crazy mouse issue in Windows PE

By | October 19, 2015

*UPDATED* 2016/10/11 – Script created to automate update on pe WIM:

The crazy mouse occurs when the embedded GPS module is detected as a Serial mouse.

To prevent this behavior, you must manually import a REG into the Windows PE boot.wim.

A registry entry must be imported into the registry of the WinPE boot media.

  1. Mount the boot wim.

Dism /mount-image /imagefile:boot.wim /mountdir:c:\mount

  1. Mount theWinPE’s SYSTEM Hive into your HKLM via regedit


Name the imported hive: importedsystem

  1. Import the REG entry below:


Windows Registry Editor Version 5.00


[HKEY_LOCAL_MACHINE\importedsystem\ControlSet001\Enum\ACPI\PNP0501\a\Device Parameters]



  • Note: if you run into permissions errors, you may need to take ownership of the imported REG and re-import the REG.

8 thoughts on “Crazy mouse issue in Windows PE

  1. Joshua

    HKEY_LOCAL_MACHINE\importedsystem\ControlSet001\Enum is a protected key. How can someone modify it? It always gives that permission is denied.

      1. Joshua

        I was able to add the registry entry. This did not resolve the issue on the Panasonic CF-3112. Is there another work around?

          1. Joshua

            No, it stops. I actually “accidentally” fixed the issue. I injected iaStorA.sys in to the boot image trying to fix a driver conflict. I do not know why, but after I did that, no more mouse jump. Coincidence?

  2. NigelB

    Hi there,

    Is the InstanceID of “a” unique for this device?


    1. Brian Gonzalez Post author


      No, this id is for a Serial mouse in the Windows OS. The reg is instructing the OS to skip detection of this device.

      1. NigelB

        Excellent ok than you,

        I ended up adding this key only in WinPE to image correctly – then included the patch in the driver package.



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