These metadata are considered to be attachments. When you download files and save them on your disk, Windows adds specific metadata to these files. Windows Attachment Manager uses the IAttachmentExecute application programming interface (API) to find the file type, the file association, and to determine the most appropriate action to take. The Attachment Manager classifies files that you download based on the file type and the file name extension. If the Attachment Manager considers a file unsafe, it prevents Windows 10 from opening it and displays a warning message. These can be files you’ve downloaded or files that Windows identifies as unsafe email attachments. In Windows 10, there’s a security feature called the Attachment Manager that blocks you from opening unsafe files. What Is the Attachment Manager in Windows 10? In this article, we’ll show you how you can stop Windows 10 from blocking your downloaded files. While you could manually unblock each file, this can be a tiring process-especially if you have to do it for almost every file you download. This happens when a Windows 10 feature called the Attachment Manager blocks files that it considers unsafe for your PC. It’ll show you a security warning that the file originated from an unknown source and can be insecure. When you try to open a file, Windows 10 might prevent you from opening it directly.
