AVD Nexus_5X_API_24 is already running. If that is not the case, delete the files at C:\...\.a...

今天开启模拟机，弹出来这么个毛病：

AVD Nexus_5X_API_24 is already running. If that is not the case, delete the files at
    C:\...\.android\avd/Nexus_5X_API_24.avd/*.lock and try again.

查了网上博文，说是因为虚拟机刚搭建好的时候默认会建立"*.lock"文件夹，而且当你把虚拟机关掉时这个文件夹会自动删除，可能是上次关PC时太草率，所以这个逗比文件夹没给删除掉， 好了，那跟着提示去找那个文件夹(报错都没给全名字对吧，可好找了)，将之删除，再启动模拟机，就OK了：