An application cannot cause a machine to shut down, restart, or hang/freeze.
Only a bug in the OS, low level driver, or defective hardware can cause that.
Do you get a blue screen and a Kernel_Security_Check error?
If so, you may have installed a recent NVidia video card driver with a serious bug in it. Check with NVidia to see if you can use the beta driver or if you need to use an older driver instead.