执行>ember install, 出现下面的错误：
version: 0.2.1
EPERM, unlink 'C:\Users\jeffrey\AppData\Local\Temp\jeffrey-E5530-jeffrey\bower\e
mber-cli-test-loader-16004-P1G8TI\archive.tar.gz'
Error: EPERM, unlink 'C:\Users\jeffrey\AppData\Local\Temp\jeffrey-E5530-jeffrey\
bower\ember-cli-test-loader-16004-P1G8TI\archive.tar.gz'
at Error (native)version: 0.2
