Microsoft KB Archive/927843

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Article ID: 927843

Article Last Modified on 3/15/2007



APPLIES TO

  • Windows Vista Business
  • Windows Vista Enterprise
  • Windows Vista Home Premium
  • Windows Vista Ultimate
  • Windows Vista Business 64-bit edition
  • Windows Vista Enterprise 64-bit edition
  • Windows Vista Home Premium 64-bit edition
  • Windows Vista Ultimate 64-bit edition



SYMPTOMS

After you try to start an application that requires administrative credentials in Windows Vista, a User Account Control dialog box appears and asks you for permission to continue. If you click Continue to switch from a user account context to Admin Approval Mode, a second User Account Control dialog box prompts you to provide the password for an administrator account. However, the desktop and the Tablet PC Input Panel are unavailable when the Tablet PC Input Panel is running in Admin Approval Mode. Therefore, you cannot use the Tablet PC Input Panel to type your credentials in the dialog box.

CAUSE

This problem occurs because the Tablet PC Input Panel always runs in the security context of a standard user account. To block malicious software from acquiring elevated administrator rights and permissions, Windows Vista only lets trusted processes run when you try to start an application that requires administrator credentials. Trusted processes are processes that run in the security context of an administrator account.

WORKAROUND

To work around this problem, use a standard keyboard to enter administrator credentials.

MORE INFORMATION

Steps to reproduce the problem

  1. Log on to Windows Vista as a local standard user.
  2. Start an application that requires administrative credentials.
  3. When a User Account Control dialog box appears, click Continue. When a second User Account Control dialog box appears, you cannot use the Tablet PC Input Panel to enter administrative credentials.


Keywords: kbtshoot kbexpertisebeginner kbprb KB927843