npm install -g expo-cli fails with "EPERM: operation not permitted, unlink '...\adb.exe'

Go through this line from your error log, it says 'C:\Users\Griseld\AppData\Roaming\npm\node_modules\expo-cli\node_modules.xdl.DELETE\binaries\windows\adb\adb.exe' npm ERR!

the expo cli wasn't installing simply because your adb is still using the previously installed expo cli on your system. had similar issue not quite long...kill the process adb.exe

Go to your task manager and kill the process of Adb.exe and boom.

More Simple Solution For Windows 10 Close The Android Emulator.

And restart the system and run npm install -g expo-cli