It's a fairly common issue when attempting to click on a link in an older version of Outlook with updated Windows 10. You don't indicate which browser you're using as default but if it's anything other than Internet Explorer, first try uninstalling the offending browser and resetting Internet Explorer as the default. Once that's done, then reinstall the browser and change the default back to what it was before.
If you're currently using Internet Explorer as your default browser, then try simply resetting it to it's default settings. (Open the Control Panel-Internet Options-Advance tab. Once that's done, click on the "Reset" button. Restart the computer and reset Internet Explorer to the default browser. To make IE11 the default browser in Windows10: Control Panel-Default Programs-Set your Default Programs, Select Internet Explorer 11.
Hope this helps.
My wife has a HP 250 GS Notebook with a 2.0 gigahertz Intel Core i3 processor and 4GB RAM. She is running Windows 10 Home 64 Bit and I noted that the latest Windows update (Version 1803) was installed on May 17. She has not used the notebook for some time (due to a wrist injury) but today when using Outlook 2010 to read her emails she got the error message “the operation has been cancelled due to restrictions in effect on this computer’. This message only occurs when she opens a Facebook email and someone says that there is a new photo and she selects it.. There are no problems opening email attachments like videos.
I did some online checking and found that it was a common problem but no one seemed to have an answer. One involved transferring registry entries from a computer without the problem but I run Windows 7 on mine and did not want to mix up operating system registry entries.
Is it possible that the Windows update caused the problem? Would appreciate some possible fixes.