Can you share the installation log file?
My guess is that the streamer is looking for a file that may not be there or has been locked by another process. Did you try restarting the computer or temporarily disabling anti-virus software to see if it helps?
The Fusion360.exe and the FusionLauncher.exe are stored in separate sub-directories (not the same directory) in:
C:\Users\***\AppData\Local\Autodesk\webdeploy\production\
If you you see the Fusion360.exe, then you're in the wrong directory to find the FusionLauncher.exe.
The file could locked due to a 3rd party application like anti-virus software. One trick to diagnose interferrence from backgorund applications is to start Windows in Safe Mode (with networking).
https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/Dia...
You may have to temporarily disable anti-virus separately. Another option may be to add an exception in your anti-virus software's settings. See teh below link for tips on how to do this.
https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/Con...
Finally, you can try manually removing all files related to Fusion 360 (perhaps the automatic clean uninstall is not removing them all). See the below instructions.
https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/How...
I hope this helps. Please let me know if you have any questions. I am happy to help.
Thanks,
Nathan Chandler
Principal Specialist