will not load minecraft

Unable to save download. fire_hurt1.ogg
Name: fire_hurt1.ogg
URL: http://resources.download.minecraft.net/6c/6c5e816813bc17b1d7b65676e1ee29496d88015b
Error details: Attempting to move successful download to C:/Users\pridg\AppData\Roaming\.minecraft\assets\objects\6c/6c5e816813bc17b1d7b65676e1ee29496d88015b
The process cannot access the file because it is being used by another process
Filename on disk: 991f-d9e9-071f-1d64
Path: C:\Users\pridg\AppData\Local\Temp\991f-d9e9-071f-1d64
Exists: file