Put the summary of the bug you're having here
When launcher is started a new file appears at launcher down load as " nativelauncher.txt
What I expected to happen was...: normal launcher start up.
Describe what you thought should happen here Not the normal launcher procedure at startup.

What actually happened was...: new window appears as "nativelauncher.txt" and applies a new desk top icon as a "file"
Describe what happened here

Steps to Reproduce:
1. Click on minecraft launcher desktop icon
2. ...new window appears as nativelauncher.txt
3. ... minecraft window appears a few moment later as normal