Windows 8 and 8.1 Forums


Windows Registry modification help needed.(i8042prt)

  1. #11


    Sloe Deth, Californicatia
    Posts : 3,908
    Windows 8 Pro with Media Center/Windows 7


    OK - I have TWO entries for this - The 2nd one looks as David's does. Still no StartValue Key. Not in Windows 7 either, just checked.

      My System SpecsSystem Spec

  2. #12


    Posts : 81
    Windows 8.1 64-bit


    Quote Originally Posted by XweAponX View Post
    OK - I have TWO entries for this - The 2nd one looks as David's does. Still no StartValue Key. Not in Windows 7 either, just checked.
    Quote Originally Posted by DavidY View Post
    For info here's what that bit of Registry looks like on my laptop.
    Quote Originally Posted by DavidY View Post

    It doesn't actually have a physical PS/2 port so I don't know how much help this is.
    Attachment 26089

    You'll see that Start is set to 3 for me, but for all I know it isn't the right setting to support PS/2, and without the hardware I can't test it.

    Is there any error or anything like it within one of the Device Manager tabs?
    Attachment 26090


    I did not mean "StartValue" I meant just "Start" that you can see 3rd from the bottom on the Registry Editor. ( meant "Start" value because I meant to the value shown near the "Start" I guess that confused everyone )
      My System SpecsSystem Spec

  3. #13


    Michigan
    Posts : 50
    Windows 8.1 64bit


    i8042 is a system service that controls ps2 mouse and keyboard ports.


    Value-Start Type-Description

    0-Boot-Specifies a driver that is loaded (but not started) by the boot loader. If no errors occur, the driver is started
    during kernel initialization prior to any non-boot drivers being loaded.


    1-System-Specifies a driver that loads and starts during kernel initialization after drivers with a Start value of 0 have been
    started.


    2-Auto Load-Specifies a driver or service that is initialized at system startup by Session Manager (Smss.exe) or the Services
    Controller (Services.exe).


    3-On Demand-Specifies a driver or service that the Service Control Manager (SCM) will start only on demand.
    These drivers have to be started manually by calling a Win32 SCM application programming interface (API), such
    as the Services snap-in.


    4-Disable-Specifies a disabled (not started) driver or service.


    5-Delayed Start-Specifies that less-critical services will start shortly after startup to allow the operating system to be responsive to
    the user sooner. This start type was first introduced in Windows Vista.
    Last edited by jladwig; 16 Aug 2013 at 12:34.
      My System SpecsSystem Spec

  4. #14


    Posts : 81
    Windows 8.1 64-bit


    Thanks for your explanation jladwig! ! !
    btw, which number should be the default?
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  5. #15


    Posts : 43
    W7 , W8 Pro x4


    The default value is 3
    It should be noted that in the first post the reference to " Startvalue " is a typo . It should have been Start value or correctly , the value Start .

    j
      My System SpecsSystem Spec

  6. #16


    Michigan
    Posts : 50
    Windows 8.1 64bit


    Sorry I don't know the default value but from what I've been able to find the default value should be 1. Looks like following the instructions you did set it back to what it should be and is what probably fixed the problem. If there was an update to this driver (can check update history) that fixed the problem it probably set the value correctly and if that value is 1 you would never know what the value was before you changed it.

    In the future, if you are going to try and change any registry settings you should make a backup before doing it in case you need to undo or go back. You can also make a back up of individual Registry keys. In your case for example -

    Before making any changes right click on the registry setting "Start"
    From the context menu select "export"
    Will prompt for a name and location to save the file, The file name can be anything you want, but the extension has to be .reg which the export process will put in - Example name: i8042prtstart.reg

    Now if you want to undo and put the value back as it was, you can double click on i8042prtstart.reg just as you would to run an application. You will be prompted to confirm you wish to import this into the registry, select Yes or OK. The settings are now back as they were.
      My System SpecsSystem Spec

  7. #17


    Posts : 43
    W7 , W8 Pro x4


    Just checked the 4 Win 8 comp's I have at the house . Two have usb kb's two are ps2 . The Start value is 3 on all four machines .
    j
      My System SpecsSystem Spec

  8. #18


    Michigan
    Posts : 50
    Windows 8.1 64bit


    Jetroho is correct, checked 2 laptops and this PC that's never had a USB keyboard or Mouse and 3 does seem to be the default value. This does make sense as shown above the driver is started by a call to an API such as New Hardware Detection.
      My System SpecsSystem Spec

  9. #19


    Posts : 81
    Windows 8.1 64-bit


    Quote Originally Posted by jetroho View Post
    The default value is 3
    It should be noted that in the first post the reference to " Startvalue " is a typo . It should have been Start value or correctly , the value Start .

    j
    Sorry for the mistake I just didn't know how to write it, from now on I'll sure know how to , but btw I wrote 'Start' value, with 'Start' under apostrophes, not 'StartValue'




    Quote Originally Posted by jetroho View Post
    Just checked the 4 Win 8 comp's I have at the house . Two have usb kb's two are ps2 . The Start value is 3 on all four machines .
    j
    Quote Originally Posted by jladwig View Post
    Jetroho is correct, checked 2 laptops and this PC that's never had a USB keyboard or Mouse and 3 does seem to be the default value. This does make sense as shown above the driver is started by a call to an API such as New Hardware Detection.
    Thanks guys very much for the help!
      My System SpecsSystem Spec

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Windows Registry modification help needed.(i8042prt)
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