Trying this right now, maybe it will work for me?
This problem seems to have many different causes. It's too bad all these issues bottleneck over this one error display. Hard to self-diagnose at 2AM.
Alright! After I ran the vcredist_x86.exe
file, my launcher started working again. Also, someone mentioned that your computer should have IE 8 installed. I installed it & rebooted immediately
before I ran the ".exe" file.
I hadn't found this solution until I attempted to re-install, and now my updates that I wiped out a few hours ago need a few more hours it install.