Files that contain the .downloadhost file extension are most commonly associated with Microsoft download settings for a variety of MSN applications. The .downloadhost file extension does not pertain to any particular file format or application.
DOWNLOADHOST files are the files that hold the settings for a user's MSN software and a user who is using Windows Live ID and other Windows applications must have a properly functioning DOWNLOADHOST file in order to use the application for IM and email purposes.
DOWNLOADHOST files contain the download settings for a variety of different Microsoft applications. These download settings may include information about file checksums, data transfers, packets, protocols and other details that are needed for an application download.
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