File Block is a new feature in Microsoft office 2010. To improve security for any company previous versions of Microsoft Office file types should not be opened without the help of Protected View. Examples of previous versions are Word 2.0 documents, Excel 4 workbooks, outlines in PowerPoint, and so on.
File Block prevents out-dated file types from opening and can cause your file to open in Protected View. The code used to open and save these older formats have vulnerabilitiesthat hackers can exploit. Thus, they present security risks that should be avoided, if possible. File Block settings are made by the system administrator, if you work in an organization. File Block helps with the following:
• Encourage similar Office file types that are used in your organization
• Lower security threats that target older Office file types
Protected View is a read-only mode in which most editing functions have been disabled. There are several reasons why a file opens in Protected View: The file was opened from an Internet location when you encounter the message in Protected View that states this file originated from an Internet location and might be unsafe. Click for more details, this is because the file is being opened from the Internet. Files from the Internet can have viruses and other harmful content embedded in them. We recommend that you edit only the document, if you trust its contents. The following image is an example:
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