Unable to AutoComplete Password. System.Security.SecurityException: Unable to create Hook. ...

Symptoms

When you try to AutoComplete a password using Wait AutoComplete, you see the following error message:

Unable to AutoComplete Password.

System.Security.SecurityException: Unable to create Hook.
  at System.Windows.Forms.SendKeys.InstallHook()
  at System.Windows.Forms.SendKeys.Send(String keys, Control control, Boolean wait)
  at System.Windows.Forms.SendKeys.Send(String keys)
  at Password_Vault.AutoComplete.SendKeys()

Applies To

Windows Vista, Windows 7

Solution

You must install an update to the Microsoft .NET Framework 1.1 Service Pack 1. It can be installed from here .
Note: Service Pack 1 must be installed on the .NET Framework prior to installing the update.