Whenever I try to play any Version of Minecraft, It crashers saying the file is already in use.

Whenever I try to play any Version of Minecraft, this report comes up: Unable to save download. en_ud.lang Name: en_ud.lang URL: http://resources.download.minecraft.net/b0/b0fe19baaa79af81d8efc03651654b74d2f16f2a Error details: Attempting to move successful download to C:/Users\sizzl\AppData\Roaming\.minecraft\assets\objects\b0/b0fe19baaa79af81d8efc03651654b74d2f16f2a The process cannot access the file because it is being used by another process Filename on disk: 8cea-3947-ecea-438b Path: C:\Users\sizzl\AppData\Local\Temp\8cea-3947-ecea-438b Exists: file