Monday, November 2, 2009

High CPU - dwwin.exe or dumprep.exe - Terminal Services - Windows Error Reporting

If you experience sudden slowdowns for your terminal services users and in your research you see the dwwin.exe or dumprep.exe is hogging the processor, disable windows error reporting. In fact, I think it is best to disable this on all terminal servers (and even all machines), unless needed, through a GPO. See http://technet.microsoft.com/en-us/library/bb490841.aspx for ways to disable error reporting.

When error reporting is enabled, an application crash spawns a process that collects information to send to Microsoft and/or for internal use. This process can really slow down your machine and in a shared environment like terminal services can have devastating effects. Luckily, it is easy to disable.

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