msvcr80.dll is a module associated with Microsoft Visual Studio 2005 from Microsoft Corporation. It is the Microsoft C Runtime Library and is used by programs written with Microsoft Visual Studio 2005.
It is required for the proper functioning of Visual Studio so it should not be removed.
Non-system processes like msvcr80.dll originate from software you installed on your system. Since most applications store data in your system's registry, it is likely that your registry has suffered fragmentation and accumulated invalid entries which can affect your PC's performance. It is recommended that you check your registry to identify slowdown issues