Steamstartup error

So I got this error when I tried to start-up G-mod.

http://img403.imageshack.us/img403/2554/steamphail.png http://img403.imageshack.us/img403/steamphail.png/1/w1280.png

Try deleting your ClientRegistry.blob file which can be found at somewhere like “C:/Program Files/Steam/ClientRegistry.blob”.