PureMessage for Microsoft Exchange: error during installation, Setup was unable to start IIS

  • Article ID: 43891
  • Updated: 11 Feb 2013


During installation of PureMessage for Microsoft Exchange, the following error message is displayed:

Setup was unable to start IIS.
Error details: COM error-code 0x80004005: Unspecified error.

The installation continues after this error message.

First seen in
PureMessage for Microsoft Exchange

Operating systems
Windows 2003


An IIS related file iisrstas.exe is not registered correctly on the server.

What To Do

Follow instructions from this Microsoft kba



If you need more information or guidance, then please contact technical support.

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