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I was experiencing consistent high CPU usage in Windows 8 Pro x64. The cause was svchost running at a constant 25% CPU, even at idle. I checked the services that the svchost was running, and toggled them on/off until I found the cause.

It turns out one service, IPHLPSVC (IP Helper), was responsible for all the CPU usage. Once I stopped the service, the CPU dropped down to 0-1% at idle.

I did some research and it seems like IPHLPSV is for transition to IPv6. I'm still on IPv4 and don't experience any issues with the task stopped. Should I just disable the task? Does anyone have any ideas of what could be causing the issue?

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I would disable the service until you know IPv6 is needed. It is usually a sound practice to disable unneeded services anyway, as it limits your exposure to security risks. –  vgoff Nov 17 '12 at 20:20
    
@vgoff Thanks for the response. That's what I was thinking too. Do you have any idea what could be causing the issue though? I thought it could be some sort of driver problem –  kyryx Nov 17 '12 at 20:33
    
No idea, you would have to consult the logs to to see what it is that the IP helper is trying to do. –  vgoff Nov 17 '12 at 20:35
    
I now have some more hints. Do you have the %windir%\system32\drivers\Tunnel.sys file? It is central to that service. Also was this a clean install of Windows 8 or an upgrade? –  vgoff Nov 17 '12 at 20:59
    
im having this prob in win7x64. maybe a week now. just bogged to @#$@#. turned off the srevice and seems to have fixed things. My dll is there, so what the heck! –  boomhauer Jan 24 '13 at 14:52

1 Answer 1

You may be able to ignore that plugin by doing the following steps.

  • Click Start, right-click Computer, and then click Properties.
  • On the Advanced tab, click Environment Variables.
  • Under System variables, click New.
  • Type MIG_UPGRADE_IGNORE_PLUGINS in the Variable name field.
  • Type IphlpsvcMigPlugin.dll in the Variable value field.
  • Click OK three times to close the dialog boxes.

You may need to restart.

This has not been tested by me, as I do not have a Windows 8 system machine to test on at the moment. This information was found for Windows 7, which may be directly relevant if you have an upgraded Windows 8 system from Windows 7.

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I do have a the %windir%\system32\drivers\Tunnel.sys file, and this is a completely clean install of Windows 8. Doesn't adding the MIG_UPGRADE_IGNORE_PLUGINS variable just do the same thing as disabling the service? –  kyryx Nov 17 '12 at 21:34
    
Unsure. I don't have a system to test on. It is likely not applicable to you regardless, as you are not involved in an 'upgrade'. –  vgoff Nov 17 '12 at 21:38

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