ActivClient install fails 'Call to DllRegisterServer failed' (Vista UAC)

windows

Symptoms

Error 0x80004005 during ActivClient install on Vista.

Likely cause

UAC is blocking the install.

Fix

1. Right-click the installer > Run as administrator. 2. Or temporarily turn off UAC (Control Panel > User Accounts > Turn UAC on/off), install, then turn UAC back on.

Sourced from militarycac.com. Rewritten for clarity.

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