We had the same problem in our application and realized that only version 1.8.1.71 is concerned and it sometimes come pre-installed on some PCs. Version 1.7.5.64 did not use Qt yet and in version 1.9.2.8, they removed the dependency in the shell overlay DLLs. So upgrading DBaR is enough to workaround the issue.
I'm a software engineer at Tableau Software and we've discovered a bug in Dell's Backup and Recovery software that is causing any 64-bit application which uses the Qt5 core DLLs to crash whenever a Save or Open file dialogue is opened. We have been able to reproduce this behavior with an extremely simple application using just QT code: #include #include  int main(int argc, char *argv[]){  QApplication a(argc, argv); QFileDialog::getSaveFileName(); return 0; } This app was built in Qt Creator with the standard Qt 5.4.1 SDK for 64-bit MSVC2013.
Backup and Recovery causing applications using Qt5 DLLs to crash