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optician
Asked: 2010-02-18 06:20:11 +0800 CST

IIS 7 503 error, application pool stop crash, defdoc.dll could not be loaded due to a configuration problem

  • 772

Currently trying to get iis 7 to work, but every time I request a page, the application pool goes into stopped status.

In the event log this is what comes back.

The Module DLL 'C:\Windows\System32\inetsrv\defdoc.dll' could not be loaded due
to a configuration problem. The current configuration only supports loading 
images built for a x86 processor architecture. The data field contains the 
error number.

I've already re installed iis, any other ideas, I read that someone fixed this by downloading the dll again, but this seems like an odd solution.

Thanks.

EDIT

I have now replaced the file with one I downloaded off the internet, and now it says

The Module DLL 'C:\Windows\System32\inetsrv\protsup.dll' could not be loaded due to a configuration problem.

I hope I don't have to get 100's of these.

iis iis-7 application-pools dll

3 Answers

  1. Im MY case this is propably related to incorrect config files as i moved IIS installation from another server and used that shared configuration functionality.

    IIS versions were the same.

    App pools are stopping right after trying to go to any site that server runs. Every site has its own application pool. Oh, i tried to set app.pool settings to allow 32bit applications just for the test but it didn't have any effect. Obvious in this case because setup worked well before and i had not changed that setting..

    BTW. Seems that general windows server administration tasks has gone out of hand what one man can handle. It might be the direction that there is more specializing in the future. Like plain IIS admins, security admins, AD admins etc.. Im glad if that IS the case somewhere. I'm trying to handle all MCITP:EA materials and this seems to take all of my time. And it's not still even close to enough..

    Im MCSE 2003 allready. And having headaches with post 6 versions of IIS..

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  2. Best Answer

    It really just seems like your IIS installation (or at least the IIS dlls...) are corrupted.

    I would perform the following steps to try and get a "clean" reinstall:

    1. Stop IIS
    2. Uninstall IIS
    3. Delete the c:\windows\system32\inetsrv directory
    4. Reboot
    5. Install IIS
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  3. ive seen the same error message. go into your app pool and be sure that you have enabled both 32 bit and 64 bit apps. next, if you are calling any 32 bit DLLs from your app and you are on a 64 bit machine you need to plop the 32 bit DLLs and any dependencies into the SysWow64/inetsrv folder along with any config files they may need. this did the trick for me.

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