opposing force stuck at 98%

[Stern]

I've had this problem for a while, but never really cared about it until recently. I've been playing through all of the official HL games, and I couldn't play Opposing Force in offline mode because it's stuck at 98% progress and won't go further when I set it to 'Always Update This Game'. As far as I can remember its always stuck at 98%. Anyone know what I could do to fix this without possibly deleting game files and redownloading it. I've got 56k, and that would take quite a while probably.

 

[Modeps]

Whenever I have that problem, I just tell it to launch the game then it usually finishes the update.