The wininet.dll file is a Dynamic Link Library (DLL) that is an integral part of the Microsoft Windows operating system. This DLL provides interface functionalities for Internet-related operations such as HTTP and FTP transactions. It is commonly used by Windows applications, including web browsers and other software that require access to the Internet, to handle data transactions over the Web.
The term "wininet" stands for "Windows Internet," and the DLL exposes a high-level API (Application Programming Interface) for applications to perform tasks like downloading files, submitting data to web servers, and handling various other Internet protocols. The wininet.dll handles tasks like managing cache, cookies, and session states, making it easier for applications to interact with Internet resources without having to deal with the nitty-gritty details of the underlying protocols.
Since wininet.dll is closely tied with Internet operations, it's considered a crucial system file. Deleting or manually modifying this file is not recommended, as it can lead to instability, errors in multiple applications, and even system failure in severe cases.
The file is usually located in the System32 directory (C:\Windows\System32), and it's managed automatically by the Windows operating system.