Msvcrt.dll provides a collection of library functions to programs using Microsoft Visual C++, or MSVC. If msvcrt.dll is corrupted or infected with a virus, error messages related to the _resetstkoflw function will appear. In that case, programs that use msvcrt.dll will not run properly, and your system may become unstable. To repair errors related to msvcrt.dll, you can overwrite the corrupted or infected file with the msvcrt.dll file stored on your Windows XP CD. Writer Bio

How To Repair Msvcrt dll on Windows XP - 43