In a windows webservere I'm trying to get a memory dump of a failing IIS 7 worker process (w3wp.exe) with no avail. In the Event Viewer I get the following. Faulting application name: w3wp.exe, version: 7.5.7600.16385, time stamp: 0x4a5bd0eb Faulting module name: clr.dll, version: 4.0.30319.1, time stamp: 0x4ba21eeb Exception code: 0xc00000fd Fault offset: 0x0000000000005c22 Faulting process id: 0x1cac Faulting application start time: 0x01cc23419da54772 Faulting application path: c:\windows\system32\inetsrv\w3wp.exe Faulting module path: C:\Windows\Microsoft.NET\Framework64\v4.0.30319\clr.dll Report Id: b54ec4f8-8fa4-11e0-ab62-005056810035 Even if I've configured LocalDumps for WER, and specifically for w3wp.exe in the registry. I get another event telling me that there is a report here: *C:\ProgramData\Microsoft\Windows\WER\ReportQueue\AppCrash_w3wp.exe_cdb8af6deb381574fe9fb0dc9aa3edaad59acd5f_cab_4fbf9b53* It contains the following files: WERD931.tmp.appcompat.txt WERDFE9.tmp.WERInternalMetadata.xml WER99EF.tmp.WERDataCollectionFailure.txt The "depressing one" is the WERDataCollectionFailure that says: Heap dump generation failed: 0x8007012b Mini dump generation failed: 0x8007001f After many tries, lots of msdn documentation and many failed google search. I'm out of ideas on how to get a dump here. Does anyone have any suggestion on how to make WER work? Thank you in advance for your time reading this :)