TF2 crashed?

I just bought TF2, and when I update it.... BOOM error. Does anyone know what's with my TF?

SS:

Delete local game files through steam and then redownload it

just click OK would fix it. And as to your question, there's probably no simple answer beyond the obvious, you downloaded it from the servers, and then it passed its final CRC check, and so it had to be redownloaded to avoid corruption.

LoL, I fixed it. I just had to restart steam xD. Thanks for help!.

it happend for me to

but ye i restarted steam

it's the same when i bought Killing floor

then the same happend

but then you can always call steam and get a new or something