"DAO is not installed" error when opening RoboHelp 8

RoboHelp 8 HTML has been installed and working fine on my computer since March, 2011. I am using Windows 7, Service Pack 1. Then, in November, 2012, a network administrator installed some Microsoft security updates on my computer. Afterwards, when I attempted to start RoboHelp, the following error appeared, and the application wouldn't open:

"DAO is not installed. This application cannot run without DAO, so please install DAO then try running the application again."

I followed the instructions on (http://forums.adobe.com/thread/249697) to reinstall and register dao360.dll, but RoboHelp still won't open, and the same error message appears. Please help!