Launch failure after Download of 2.80 & 2.79 on windows 10 Currently have 2.79 on windows 10. Previously also had 2.80 but got rid of it to download a later build. Now WHEN I download it I cannot launch it successfully:

I proceed as normal to open it... ie click on blender.exe to launch it.But at this point it fails saying. " Code execution cannot proceed because the following cannot be found (though I can see them all there)..
avcodec-58.dll, python 37, SDL2, avformat-58.

Though I already have 2.79 working well - I  downloaded it again (to see if the problem was just 2.80 and when I came to launch it got...  code execution cannot proceed because following not found:
python 37.dll, libsndfile-1, open Al32, SDL2.dll 

Any suggestions on how I can proceed to rectify this would be greatly appreciated.
I think what's going on here is that double clicking the zip file in the file browser doesn't actually extract the zip file contents, it just gives you a view of the zip file contents. That looks just like if you had extracted the zip file.

What you should do is:


Download the zip file
Right click it and do "Extract all"
After extraction is done, you should now be able to execute blender.exe from within the extracted folder.


One thing to look out for is that inside the not-extracted zip file, blender.exe will have a generic (non-Blender) icon.

After "Extract all", blender.exe will have the Blender icon.

The above instructions solved my problems when trying to run Blender 2.80 RC2 from a zip file on Windows.