2017-08-19 10:00:28,533 main ERROR Unable to move file C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log to C:\Users\Uncetic\AppData\Roaming.minecraft\logs\2017-08-19-2.log: java.nio.file.FileSystemException C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log -> C:\Users\Uncetic\AppData\Roaming.minecraft\logs\2017-08-19-2.log: The process cannot access the file because it is being used by another process.
2017-08-19 10:00:28,570 main ERROR Unable to delete file C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log: java.nio.file.FileSystemException C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log: The process cannot access the file because it is being used by another process.
I do not have any text editing files open, and I have had this problem for a while now.
And it says this in the log.
2017-08-19 10:00:28,533 main ERROR Unable to move file C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log to C:\Users\Uncetic\AppData\Roaming.minecraft\logs\2017-08-19-2.log: java.nio.file.FileSystemException C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log -> C:\Users\Uncetic\AppData\Roaming.minecraft\logs\2017-08-19-2.log: The process cannot access the file because it is being used by another process.
2017-08-19 10:00:28,570 main ERROR Unable to delete file C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log: java.nio.file.FileSystemException C:\Users\Uncetic\AppData\Roaming.minecraft\logs\latest.log: The process cannot access the file because it is being used by another process.
I do not have any text editing files open, and I have had this problem for a while now.
See point 2 here http://www.minecraftforum.net/forums/support/unmodified-minecraft-client/2827415-1-12-faqs-read-before-posting