it wont let me open minecraft (download the versions, within the launcher)

Unable to save download. 1.11.2.jar
Name: 1.11.2.jar
URL: https://launcher.mojang.com/mc/game/1.11.2/client/db5aa600f0b0bf508aaf579509b345c4e34087be/client.jar
Error details: Attempting to move successful download to C:/Users\User\AppData\Roaming\.minecraft\versions\1.11.2/1.11.2.jar
The process cannot access the file because it is being used by another process
Filename on disk: 467a-d883-d472-b40f
Path: C:\Users\User\AppData\Local\Temp\467a-d883-d472-b40f
Exists: file