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IMAC system thread exception not handled igdkmd64.sys error

1818 Views 8 Replies Latest reply: Sep 5, 2013 2:20 PM by wojski RSS
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Aug 12, 2013 3:11 AM

I am running an imac with bootcamp 5 and windows 8, when left unattented it will give this error then reboot.


Imac is 27"  2.7 i5 AMD Radeon HD 6770M


Any help appreciated.



iMac (27-inch Mid 2011), Windows 8
  • wojski Level 1 Level 1 (0 points)


    I just set-up my iMac with bootcamp Win 8 and have exactly the same experience, at least one or more times a day.

    Any idea or fix? on the latest of everything,,,




  • Rudegar Level 6 Level 6 (18,435 points)

    when I first installed win8 upgrade for my win7 i let windows update install what it said was a newer ati driver

    I said yes and it was big big trouble

    went back to the driver that came with the apple driver pack from osx bootcamp and it was better still had crashes once in awhile

    then apple started to official support win8 and I updated the ati driver with the new one from the apple driver pack and all have been well since


    can't remember if it was the same eror text I had though

  • Rudegar Level 6 Level 6 (18,435 points)

    Win8.1 is nor a finished product it will not be released for another month or so

    And then it could take some time before it get official support in bootcamp after theat

  • The hatter Level 9 Level 9 (58,545 points)

    October 17th. It is "RTM" and everyone is furious that MSDN and others will not have access to the final bits until then.


    It runs better than 8.0 (on my own PC I built 4+ yrs ago) than 7 ever could or than 8 (I have dual boot with 8 and 8.1 on their own SSDs)

  • wojski Level 1 Level 1 (0 points)


    OK, what a pain but finally resolved for me.

    I was a bit confused as I thought it was with the 6770M graphics driver but finally found that it was with the seperate Intel one ofcorse that must have come down with Windows Update automatically (I was unlucky I think when setting up via bootcamp the drivers were not inserted even though I did the exact same thing and it worked beutifully before.. later I couldn't find the bootcamp control panel so I installed it and a little bit after this issue started exhibiting)


    Anyways in Win 8 Device Manager under View Menu your select Show hidden Devices, then (finally) under Diplay Adapters "Intel(R) HD Graphics Family (Microsoft Corporation - WDDM 1.2)" pops up.... you might be able to disable it there, although for me this was greyed out (probably because in the driver it actually said "Currently, this hardware device is not connected to the computer. (Code 45)... ha ha ha... thanks for whoever installed it then).  Anyways, I uninstalled it but problem still kept happening... ***?!?... so in the end I just found the igdkmd64.sys file under drivers and renamed it... problem finally fixed... no crashes.... hope that assist someone or at least sheds some light.


    good luck



  • wojski Level 1 Level 1 (0 points)

    Strange, mine hasn't crashed again... I renames two of the files btw... yes, my clock was also out even though it was getting internet time?!? I have seen that before, anyways, if you change to different internet time provider and update it seems to fix it up after a bit of fiddling... I think this is just a windows thing...


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