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On the Start menu, point to Settings, click Control Panel, double-click Administrative Tools, and then double-click Component Services.
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In DCOMCNFG, right click My Computer, and click properties.
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Select the COM Securities tab.
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In Launch and Activation Permissions, click Edit Defaults and add Network Service to it and give it Local launch and Local Activation permission. Do the same for < Machine_name >\Users.