为什么 Avira 认为"CoCreateInstance()"是恶意软件？

我使用visual studio 2017创建了c++控制台应用程序，它是extract.zip文件。但是，当我运行application.exe文件时，Avira防病毒软件会将我的exe检测为恶意软件。

我发现CoCreateInstance(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **)&pISD)函数的实际Avira会产生问题。

为什么Avira将CoCreateInstance(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **)&pISD)视为恶意软件？

我的功能：

bool Utils::Unzip2Folder(BSTR lpZipFile, BSTR lpFolder)
{
IShellDispatch *pISD;
Folder  *pZippedFile = 0L;
Folder  *pDestination = 0L;
long FilesCount = 0;
IDispatch* pItem = 0L;
FolderItems *pFilesInside = 0L;
VARIANT Options, OutFolder, InZipFile, Item;
CoInitialize(NULL);
__try {
if (CoCreateInstance(CLSID_Shell, NULL, CLSCTX_INPROC_SERVER, IID_IShellDispatch, (void **)&pISD) != S_OK)
return 1;
InZipFile.vt = VT_BSTR;
InZipFile.bstrVal = lpZipFile;
pISD->NameSpace(InZipFile, &pZippedFile);
if (!pZippedFile)
{
pISD->Release();
return 1;
}
OutFolder.vt = VT_BSTR;
OutFolder.bstrVal = lpFolder;
pISD->NameSpace(OutFolder, &pDestination);
if (!pDestination)
{
pZippedFile->Release();
pISD->Release();
return 1;
}
pZippedFile->Items(&pFilesInside);
if (!pFilesInside)
{
pDestination->Release();
pZippedFile->Release();
pISD->Release();
return 1;
}
pFilesInside->get_Count(&FilesCount);
if (FilesCount < 1)
{
pFilesInside->Release();
pDestination->Release();
pZippedFile->Release();
pISD->Release();
return 0;
}
pFilesInside->QueryInterface(IID_IDispatch, (void**)&pItem);
Item.vt = VT_DISPATCH;
Item.pdispVal = pItem;
Options.vt = VT_I4;
Options.lVal = 1024 | 512 | 16 | 4;//http://msdn.microsoft.com/en-us/library/bb787866(VS.85).aspx
bool retval = pDestination->CopyHere(Item, Options) == S_OK;
pItem->Release(); pItem = 0L;
pFilesInside->Release(); pFilesInside = 0L;
pDestination->Release(); pDestination = 0L;
pZippedFile->Release(); pZippedFile = 0L;
pISD->Release(); pISD = 0L;
return retval;
}
__finally
{
CoUninitialize();
}
}