Steam : Error Code 51

[HEADRAT]

None of my Stream Games start anymore, all Error Code 51

I've tried deleting everything from my Steam folder other than Stream.exe and steamapps but it just seems borked

HEADRAT

 

[HEADRAT]

It all seemed to be a conflict with Airfoil, I un-installed that and now everything is working, how odd!!

https://support.steampowered.com/kb_article.php?ref=2235-YXVB-8261

 

[HEADRAT]

Yeah me too, back to Trine2