when shutting down the emulator i get the error:

Emulator: qemu-system-i386.exe: Unable to open C:\Users\Nihal\.android\avd\Nexus_5X_API_27_x86.avd\data\misc\pstore\pstore.bin: Permission denied 

in event log.. also even after having high end graphics card the emulator lags a lot which didnt use to happen earlier...