Why can’t I send the CTRL ALT DEL command when I connect to my host computer?

From the Citrix website:

The GoToMyPC software is designed to work with the Windows User Account Controls (UAC) feature for the personal security of each user.  If the User Account Controls are turned off, you may have problems sending the CTRL+ALT+DEL command to your host computer.  

Turning User Account Controls On:
1. Click Start
2. Select the Control Panel
3. Select User Accounts
for Windows Vista:

4. Click Turn User Account Control on or Off

User-added image5. Check User User Account Control (UAC) to help protect your computer
6. Click OK

Note: You must restart your Host computer for the changes to take effect.
for Windows 7:

4. Click Change User Account Control settings

User-added image

5. Windows 7 offers four different User Account Control Settings.  GoToMyPC’s CTRL+ALT+DEL feature may not function correctly if the slider is set to the bottom setting, Never Notify.  Move the slider up to select one of the other settings and click OK.  We recommend at least the default setting.

Note: You may have to restart your computer for the changes to take effect.

You should now be able to send the CTRL+ALT+DEL command to your host computer.  If you continue to have problems, your computer’s Group Policy may need to be configured to accept this command when it is sent remotely.  Click here for details.

Common Windows Logo Key Shortcuts

Windows logo key                          Open or close the Start menu.
Windows logo key +Tab                 Cycle through programs on the taskbar by using Aero Flip 3-D.
Windows logo key +Spacebar        Preview the desktop.
Windows logo key +Up Arrow        Maximize the window.
Windows logo key +Left Arrow Maximize the window to the left side of the screen.
Windows logo key +Right Arrow Maximize the window to the right side of the screen.
Windows logo key +Down Arrow Minimize the window.
Windows logo key +Home Minimize all but the active window.

Windows logo key +D Display the desktop.
Windows logo key +M Minimize all windows. (+Shift-M to maximize)
Windows logo key +E Open Windows File Explorer
Windows logo key +F Search for a file or folder.
Windows logo key +G Cycle through gadgets.
Windows logo key +L Lock your computer / switch users.
Windows logo key +P Choose a presentation display mode.
Windows logo key +R Open the Run dialog box.
Windows logo key +T Cycle through programs on the taskbar.
Windows logo key +U Open Ease of Access Center.
Windows logo key +X Open Windows Mobility Center.