WinError 740

[drivenlifteds1o]

Fusion worked fine up until yesterday, when I tried to open it i got nothing besides icon in windows tray.  I tried repairing and resetting thru the utility, nothing.  I then uninstalled and reinstalled, same issue, if i try to reinstall it prompts that I have a current version installed and then gives me WinError 740 when i try to open from prompt. Attached is the log.

[sutherland-]

Hi @drivenlifteds1o 

First, try this troubleshooter form  to help solve the most common issues causing issues installing Fusion 360.
Alternatively, you can follow the manual steps below:

Disable UAC Settings

1. Configure the application to run as administrator by right clicking on the .exe and select the option to run as admin.
2. Disable User Account Control Settings.

Reset reset winsock

1. Open up the Command Prompt by searching CMD. 
2. Right click on the Command Prompt app and click Run as Administrator. 
3. Type the command netsh winsock reset and press enter.
4. Restart the machine and try the installation for Fusion again.

Perform a manual re-install of F360.

[drivenlifteds1o]

I have tried these steps multiple times, no luck.

[sutherland-]

One last thing that I can think of is to try running the installation file or the software as an Administrator. If that does not work, my best guess would be either waiting until someone reply's here or try contacting support.