Okay, I found another thread that pretty much described my problem to a "T". The answer there was to run the following command:
"ant -f config.xml installService" from the <Windchill root folder>\HTTPServer
the first time I got "ant" is not recognized as an internal or external command....
Figuring this was a path problem I executed the following command:
<Windchill root folder>\Windchill\ant\bin\ant -f config.xml installService from the same directory as above
The script started off with an error "Unable to locate tools.jar. Expected to find it in C:\Program File\Java\jre7\lib\tools.jar
but other than that the script seemed to run to a successful conclusion:
BUILD SUCCESSFUL
Total time: 6 seconds
Unfortunately, that didn't seem to solve my problem. It didn't start up the HTTP server, and when I tried restarting the Windchill directory Server via the Control Panel, the HTTP server still did not come up.
Any advice would be greatly appreciated.