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Click on File from the top toolbar and then select Save As from the menu. start "" /Realtime "C:\Program Files\BlueStacks\BstkSVC.exe".start "" /Realtime "C:\Program Files\BlueStacks\Bluestacks.exe".start "" /AboveNormal "C:\Program Files\BlueStacks\HD-Agent.exe".start "" /Realtime "C:\Program Files\BlueStacks\HD-Player.exe".Then open your Notepad and copy the following into it. If it works, please close all the processes you have opened. After that, exit the Task Manager and restart your computer to see if the error is fixed. Right-click BstkSVC.exe and set its priority as Realtime. Right-click Bluestacks.exe and set its priority as Realtime. Right-click HD-Agent.exe and set its priority as Above normal. Then hover over the Set Priority option and select RealTime.
Press the Ctrl, Shift, and Esc keys at the same time to open the Task Manager window.
If the BlueStacks' priorities on your computer are not right, your computer may also not turn off successfully.
Once done, try turning off your computer to determine if the VirtualBox Interface prevents it from doing so. Next, click Check for updates and then apply the updates and relaunch the emulator. On this software, click the gear icon in the lower right corner to open Settings window. In this situation, you'd better update BlueStacks on your computer to fix this error. If BlueStacks on your computer is not up to date, you may encounter the "VirtualBox interface has active connections" error message when you turn off your PC. Turn off your computer and check to see if you still receive the same error message. Then, one by one, right-click the BlueStacks-related tasks and select End task from the menu.
Press Ctrl, Shift, and Esc keys at the same time to open the Task Manager window. Then you can close your computer successfully. In this situation, you need to force close it via the Task Manager. Some people have reported that the computer will be hard to close when BlueStacks is running.