Disable any AV program you have running, then redownload the installer and try agin. I recommend reverting back to Default Windows GUI, deactivate the WB license in WB UI, Uninstall WB, reboot, THEN install WB 10. Yeah, I know, a lot of steps but from my experience, it was needed to get the correct version number to show in About WB and in the systray. YMMV
P.S. It was worth it, I'm really liking the new look.