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Ctrl-Alt-Del function with Windows On-Screen Keyboard and Tablet Keyboard - ThinkCentre M70z, M90z, Edge 91z

Ctrl-Alt-Del function with Windows On-Screen Keyboard and Tablet Keyboard.

Affected configurations

The above symptom is associated with, but not limited to, the following systems:

  • ThinkCentre M70z
  • ThinkCentre M90z
  • ThinkCentre Edge 91z

Applies to:

Microsoft Windows 7

The system is configured with touch screen.


None. Do not replace any hardware for this issue.


Users operating touch screen systems with no keyboard may have limited use of Ctrl-Alt-Del.

Windows Secure Login

In order to issue Ctrl-Alt-Del, the user will need to access the On-screen keyboard available via the Ease of Access tools. Press Windows Key + U to open the Ease of Access menu. Choose to Type without the keyboard (On-screen keyboard) and press OK. The on-screen keyboard will appear and the user should press Ctrl then Alt and then finally the Del key.

Operating System

Ctrl-Alt-Del cannot be issued from the On-screen keyboard or Tablet keyboard in the Windows operating system. This limitation is by Microsoft design.

If you are unable to find what you are looking for, please do try the following options:
1. Lenovo Assisted Search
2. Product usage and general troubleshooting tips
3. Lenovo Support Forum
4. Technical Support Call Centre

Country Availability
Alias ID : SF11-D0105
Document ID : HT050730
Last Updated :
Copyright © Lenovo 2013, all rights reserved
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