Update your GPU drivers to the latest version. Configure your antivirus correctly as it may be interfering with BlueStacks.Increase the allocated CPU cores and RAM to BlueStacks.Ensure that your PC fulfills the minimum system requirements.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 if BlueStacks 5 fails to start.
If BlueStacks 5 cannot start or if you see an error code at the time of launching BlueStacks 5, such as 'Error code: -1101', 'Error code: -2001' or 'Error code: -2004', you can resolve it by following the steps given in this article.