Power BI Desktop not Launching

Try this solution from Microsoft helpdesk:

Please check whether you have any Ad-Aware Web Companion installed. If yes, please follow the instruction on the link below, then reboot and installed and launch the desktop again.

Uninstall Lavasoft Web Companion

http://www.lavasoft.com/mylavasoft/support/supportcenter/technicalproblems/faqs/how-to-uninstall-adaware-web-companion

Uninstall the LavasoftTcpService.dll after uninstalling Web Companion, please:

a.Start Command Prompt as an administrator by right-clicking it and selecting "Run as administrator."

b.Enter the this command to reset the network adapter: "netsh winsock reset" without the quotation marks and hit Enter.

c.Restart the computer.

d.Delete these two files: C:\WINDOWS\system32\LavasoftTcpService64.dll  and C:\WINDOWS\SysWOW64\LavasoftTcpService.dll