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Login as user and run these 3 commands from the commandline:
Rundll32 iesetup.dll, IEHardenLMSettings
Rundll32 iesetup.dll, IEHardenUser
Rundll32 iesetup.dll, IEHardenAdmin
Source: Can't disable internet explorer enhanced security configuration on Server 2008 R2
Rundll32 iesetup.dll, IEHardenLMSettings
Rundll32 iesetup.dll, IEHardenUser
Rundll32 iesetup.dll, IEHardenAdmin
Source: Can't disable internet explorer enhanced security configuration on Server 2008 R2