Office Web Apps Server IIS site disappeared?

I deployed an Office Web Apps server on a dedicated VM to be used for Lync 2013. After the initial installation / set up, I confirmed the discovery URL. It worked fine.
However, after one point in time, PowerPoint Presentations stopped working. When trying to share a PPT presentation, the Lync client popped up a message saying "Sorry, we couldn't upload <ppt file name> because we're having trouble connecting
to the service. If this keeps happening, try contacting your support team". I've done many many Lync and Office Web Apps install myself previously, and never had a message pop up like the one I saw in this case.
I tried going to the Web Apps discovery URL again, and it didn't get anywhere. I got on the Web Apps server and all the IIS sites were wiped.
I tried uninstalling the Office Web Apps server and reinstalling, but from that point on, IIS sites for Web Apps just would not appear under IIS manager.
Has anyone had similar issue with Office Web Apps?
Thanks,
Andrew Shin, TechNet Forum replies

Hello,
Maybe the windows update is active and configured to Automatically download and installed update of Office Web Apps and this behavior just breaking your setup.
Try
remove the farm of WAC
Install SP1  
and start new deployment of farm.
Link SP1
 http://www.microsoft.com/en-us/download/details.aspx?id=42547
How update your farm Office Web Apps
 http://technet.microsoft.com/en-us/library/jj966220(v=office.15).aspx
Hugs[]s
Robson Hasselhoff - Follow me @Robk9e

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