launcher bug

every time I click on play, it loads and a pop up comes up with:

Unable to create directory. guava-17.0.jar
Name: guava-17.0.jar
URL: https://libraries.minecraft.net/com/google/guava/guava/17.0/guava-17.0.jar
Error details: The file or directory is corrupted and unreadable
Filename on disk: 3153-e9d9-fd71-8eab
Path: C:\Users\David\AppData\Local\Temp\3153-e9d9-fd71-8eab
Exists: file

please help me!!!!!