Netflix, Chrome and Silverlight have fallen out on my PC...HALP!S

So there I was just innocently interneting away when i thought i'd watch some Top Gear. Its what i do in lieu of an actual exercise regime; 30mins here...an hour there.... its all good. Only today, I ran straight into a brickwall of sadness... Error Code 2104, there is a a problem with your silverlight installation.

Was working fine up until that moment. Cannot for the life of me think what I might have done to frack it up; i've isntalled nothing, deinstalled nothing, etc...

So i've tried all the solutions I could find and i've got nothing. Nada. Zip. Bupkiss.

Anyone else ran across this and what creature did you sacrifice in order to make the universe right again?