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<blockquote data-quote="Requiem" data-source="post: 948242" data-attributes="member: 117808">Tracked it down. Wow, this one really cost my nerves. The problem is a mixup of 32 and 64 bit applications on the same IIS while running a Windows Server Update Services Site on that machine. The problem is, that WSUS installs a globally registered dynamic compression library called suscomp.dll which is not compatible with 32bit applications (it is used to compress updates before streaming them to the clients). Therefor, 32bit applpication calls cause a HTTP500 internal server error linked to the DynamicCompressionModule as they will search for the 32bit version of the .dll (in %windir%/SYSWOW64/inetsrv). But that version is not installed with WSUS. *sigh*.So, what you simply need to do to get things up and running:&nbsp;Method 1) Simply find yourself a 32-bit suscomp.dll (it can be extracted from some freely availabl Microsoft install packages) and copy it to that directory mentioned above. Done.&nbsp;Method 2) Disable the compression scheme by typing%windir%\system32\inetsrv\appcmd.exe set config -section:system.webServer/httpCompression /-[name='xpress'](this disables the compression scheme for the whole server, it cannot be done on specific sites only)&nbsp;This one was _really_ annoying! Hope my solution will help someone else!</blockquote>

[QUOTE="Requiem, post: 948242, member: 117808"] Tracked it down. Wow, this one really cost my nerves. The problem is a mixup of 32 and 64 bit applications on the same IIS while running a Windows Server Update Services Site on that machine. The problem is, that WSUS installs a globally registered dynamic compression library called suscomp.dll which is not compatible with 32bit applications (it is used to compress updates before streaming them to the clients). Therefor, 32bit applpication calls cause a HTTP500 internal server error linked to the DynamicCompressionModule as they will search for the 32bit version of the .dll (in %windir%/SYSWOW64/inetsrv). But that version is not installed with WSUS. *sigh*. So, what you simply need to do to get things up and running: Method 1) Simply find yourself a 32-bit suscomp.dll (it can be extracted from some freely availabl Microsoft install packages) and copy it to that directory mentioned above. Done. Method 2) Disable the compression scheme by typing %windir%\system32\inetsrv\appcmd.exe set config -section:system.webServer/httpCompression /-[name='xpress'] (this disables the compression scheme for the whole server, it cannot be done on specific sites only) This one was _really_ annoying! Hope my solution will help someone else! [/QUOTE]

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