Bad image 2.7.0 64 bit on Windows 10

[Arakade]

Hi
Just upgraded to 2.7.0 64 bit.  Did a *full* install.  Still have 2.6 and 2.5 installed.
When I first start 2.7.0 from Start Menu, I get the attached dialog indicating avformat-57.dll is somehow ... wrong.
I'll uninstall and try a reinstall, maybe remove old version, etc.
Thought you might want to know in case it's a wider problem.
HTH.

[Arakade]

Uninstalled and reinstalled as 'standard' (not full).  Works fine.