Install the latest updates for your Windows. Scan for and repair any corrupt files on your computer. Update your GPU drivers to the latest version.
If you see a message after launching BlueStacks 5 stating that some minor repairs are needed, you can resolve it by clicking on "Repair now". The images below show the pop-ups that you may see when BlueStacks 5 fails to start. In the event that BlueStacks 5 cannot start or if you see an error code at the time of launching BlueStacks 5, such as "Error code: -1101" or "Error code: -2004", please follow the steps listed in this article to resolve it.