Android emulators (BlueStacks, NoxPlayer, LDPlayer) increasingly attract HWID bans. Mobile anti-cheats (Genshin Impact, PUBG Mobile, Mobile Legends) detect emulators by signature and ban not just the account but the underlying PC's hardware.
Mechanism: the emulator runs an Android VM, and the mobile anti-cheat reads Android-side identifiers (Build.SERIAL, ANDROID_ID). The emulator forwards them from the host PC, so the ban lands on the PC's HWID.
Bypass: change HWID on the host PC + reinstall the emulator with new factory data. Recovery rate ~90% on the first try, doesn't require Android root.
Best practice: a separate emulator profile per game. BlueStacks supports multiple instances, each with its own ANDROID_ID. A ban on one instance doesn't affect the others.