I. The blue screen immediately following the emulator's execution is caused by not having disabled Hyper-v/VBS, which is necessary for the emulator to run properly. >> How to turn off Hyper-v/VBS.
II. If MuMu freezes at 99% while loading after rebooting the PC following a blue/black screen occurrence, download and run this hotfix here. Decompress the files and double click "double click.bat" to execute it, then restart the emulator.