Problem with Unity Plugin version 4.2.1f4

how i can fix it?

yesterday the game worked…

:face_with_spiral_eyes: help

There is a new runtime player that has been released. The browser plugin should download an install this new player. I suspect something has gone wrong. Maybe uninstall the web browser plugin, then download a fresh copy from the Unity website and install it. Then try to view some demos on the Unity website, which should fetch the new player.

The new player runtime that was released requires powerful pc?

when I click on install manually redirects me here: Unity Real-Time Development Platform | 3D, 2D, VR & AR Engine

I need the plugin or the full version from 880 mb?

I solved it by formatting computer. What was the problem?