A software wrapper is a special type of application modification that is used by some file-hosting websites. It is a third-party tool that installs the program you intended to download but adds additional software, such as toolbars or adware. The additional software may also make changes to your web browser’s home page and search settings. Also, file-hosting websites often do not notify the software vendor or download recipient that modifications have been made and do not easily allow opting out of modification. For these reasons, ESET classifies software wrappers as a type of potentially unwanted application to allow users to accept the download or not.