Glitched please help

This popped up
Unable to save download. tlh_aa.lang
Name: tlh_aa.lang
URL: http://resources.download.minecraft.net/f6/f61b0dfba0919ac8723cf5337d90f7a28c4ade9a
Error details: Attempting to move successful download to C:/Users\jacob\AppData\Roaming\.minecraft\assets\objects\f6/f61b0dfba0919ac8723cf5337d90f7a28c4ade9a
The process cannot access the file because it is being used by another process
Filename on disk: a151-1dea-4637-25a4
Path: C:\Users\jacob\AppData\Local\Temp\a151-1dea-4637-25a4
Exists: file
My account is JacobTheBulldog7