unable to save download

Unable to save download. grow4.ogg
Name: grow4.ogg
URL: http://resources.download.minecraft.net/a2/a2c1116d40b879a0abccc2f02c0471be91bb6b30
Error details: Attempting to move successful download to C:/Users\USER\AppData\Roaming\.minecraft\assets\objects\a2/a2c1116d40b879a0abccc2f02c0471be91bb6b30
The process cannot access the file because it is being used by another process
Filename on disk: ba38-d9f0-13ef-80b8
Path: C:\Users\USER\AppData\Local\Temp\ba38-d9f0-13ef-80b8
Exists: file