Scale Infestation

I have some sort of scale infestation on a small bush on my lawn. I'm not sure what sort of infestation it is. Photos are attached.

Any clue as to what it really is?

And any tips on how to handle it? The branches on the bush still appear viable, but is this bush a gonner? And an adjacent shrub is partially affected - how far will it spread?

Any help most appreciated.

Edit: found out elsewhere it's Euonymous scale. It can spread. Provado was recommended, along with pruning.