.DLL (Dynamic Link Library) files are components of the Windows operating system and many software applications. These DLL files enhance the efficiency of software applications and the operating system by providing shared access to a common set of functions. Instead of every application having its own copy of every function, common functions are kept in these DLL files so they can be shared among many applications.
Should a function within a DLL file need an update or encounter an error, developers can simply update the specific DLL file. All software applications that utilize this .dll file benefit from the update, eliminating the need to modify each program individually. However, if a DLL file becomes corrupted or goes missing, it can cause issues with any program that relies on it.
You can install 32-bit DLL files on a 64-bit system. In a 64-bit Windows, 32-bit DLLs go in the "SysWOW64" folder, while 64-bit DLLs go in the "System32" folder. Always make sure to put the DLLs in the right folder.