half life 2 help plz i get this error

[paulgrffth]

when i double click the game to run i get error saying
unable to run engine.dll any help would be apprciated thanks alot

 

[dkirkpatrick]

engine dll error message

Hi

I have the same problem since downloading the recent update.

Did you get a reply to your question? If so can you help me, please?

Thanks