To install offline, you need the (usually a .exe file larger than 400MB) rather than the online downloader.
Slide the FPS counter to or 240 depending on your screen refresh rate. Troubleshooting Common Errors Stuck at 99% Loading Screen
Avoids the "Installation Failed" errors often caused by unstable network connections during online setup.
Run multiple games or accounts simultaneously with minimal impact on system resources.
This usually happens if your antivirus is blocking the emulator engine or if Virtualization (VT) is turned off. Add an exception for MSI App Player in your antivirus settings.