External Links causing errors in the file

When I open a excel file, the files opens up with a error message appearing. In short it says The workbook contains links to external sources and can be unsafe, before this I had the trust centre popping up asking if I should trust the file, but I went to the settings and changed the trust settings which disabled the error message. The message also says that if I trust the links I can update them or leave it.I have two options "Update" or "Don't Update", if I press either I get another windows message saying that it found one or more circular references in the workbook and then proceeds to say FYI: A circular reference can be a formula that refers to its own cell value, or refers to a cell dependent on its own cell value. There is only one option available called "OK", when I press this no workbooks are seen and the file is blank , when a create a new workbook it makes a new one and still doesn't show other workbooks.