IE-11 Tabs

win7 pro x64 sp1
IE-11
Internet Secure Lock down 2.00.105

I need to access a website that uses adobe pdf documents and opens them in a new tab.
the pdf documents open in the new tab and display correctly but the tab can not be closed.
When the attempt is made to close the tab a message stating the action is not allowed due to system settings is posted.

Any suggestions would be appreciated.

Try disabling the IE Lockdown > Layout Options > No Tabs option.

That option allows open the pdf in a new window.
What I am looking for is a way to close the tab after it has been opened.
To be able to close a open tab it looks like I will need to allow new windows.

Any other  suggestion appreciated.

Try unchecking the IE Lockdown > General Options > No Browser Close option.