when i try load up and version of minecraft it says this: Unable to save download. be_by.lang

Name: be_by.lang
URL: http://resources.download.minecraft.net/ea/ea11a2a16e8b52afd92723c2b04aee42f6e68a94
Error details: Attempting to move successful download to C:/Users\PC\AppData\Roaming\.minecraft\assets\objects\ea/ea11a2a16e8b52afd92723c2b04aee42f6e68a94 The process cannot access the file because it is being used by another process
Filename on disk: c9e1-c38c-c56e-4201
Path: C:\Users\PC\AppData\Local\Temp\c9e1-c38c-c56e-4201
Exists: file

please help me