Run-Time Check Failure #2 - stack around the variable 'osvi' was corrupted on mfc application

Run-Time Check Failure #2 - stack around the variable 'osvi' was corrupted
on mfc application

I've been searching around the internet and I have no idea why this
happens, it's not really an obvious array issue.
Here's the function:
BOOL IsOsCompatible()
{
BOOL retVal = 0;
OSVERSIONINFO osvi;
ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
GetVersionEx(&osvi);
if(osvi.dwMajorVersion == 6)
{
if(osvi.dwMinorVersion == 0)
{
if(SendErrorM("This program has not been tested on Windows
Vista(TM).\nAre you sure you want to use it?",MB_YESNO) ==
IDYES)
retVal = 1;
}
else if(osvi.dwMinorVersion == 1)
{
retVal = 1;
}
else if(osvi.dwMinorVersion == 2)
{
if(SendErrorM("This program has not been tested on Windows
8(TM).\nAre you sure you want to use it?",MB_YESNO) == IDYES)
retVal = 1;
}
}
else
SendErrorM("Your windows verison is incompatible with the minimum
requirements of this application.",NULL);
return retVal;
}
Any ideas?