Msvcrt80.dll errors normally occur when you attempt to install an application, you may also experience errors during the shutdown or startup process. The reason behind it is in most cases a missing or corrupted msvcr80.dll file.
The msvcr80.dll file is a core Windows file and is required for the stable operation of your Windows Operating System:
Msvcr80.dll is the Microsoft Visual C Runtime Library 2005 and this file is required to run programs written in Microsoft Visual Studio 2005.
may fix the problem
or you can download a new version of the file by donloading and runnng this click here from Microsoft, it will give you an upto date version of Microsoft Visual C