Only possible to start a program by using right click and use 'run as' Sundenly on my Windows XP-pro systems this happens. Double left click on any Program Icon does not work anymore. Dec 27, 2018 - If Taskbar is already frozen, then you will not be able to use the Start Menu as well. Type explorer.exe and hit OK to restart the Explorer. The following folder: C:WindowsSystem32 and right-click on cmd.exe and select Run as administrator. Press Windows Key + R and type”sysdm.cpl” then hit enter.