in cant access minecraft download/update

What Unable to save download. es_uy.lang
Name: es_uy.lang
URL: http://resources.download.minecraft.net/b8/b85ec81637ef59ec5fac01d369ba0ef7a4568cb4
Error details: Attempting to move successful download to C:/Users\Alfie\AppData\Roaming\.minecraft\assets\objects\b8/b85ec81637ef59ec5fac01d369ba0ef7a4568cb4
The process cannot access the file because it is being used by another process
Filename on disk: d2ba-0326-9566-f87c
Path: C:\Users\Alfie\AppData\Local\Temp\d2ba-0326-9566-f87c
Exists:

what does this mean and how can I fix it simply?