Hi
In the meantime if you need a working search engine try, Agent Ransack.
It's what I use in place of the Windows search engine anyway.
It adds a search function to your right click drop down list that will start searching from wherever you click.
It has a lot of search options and is very fast.
http://www.mythicsoft.com/agentransack
I didn't download your file, the thought of a .txt file that takes 15Mb kind of put me off. LOL
How many pages does it take to make a .txt file that big?
Of the 3,756 .txt files on my C:\ drive, the largest one is 72 kb.
My CBS log file is in .log format, and is 462 kb.
It took me about 20 seconds to find that out using Agent Ransack.
Anyway good luck, I know I had a really bad time trying to get Windows 8 to run the firewall, for reasons that seemed mystical but turned out to have to do with the way that the permissions were set up.
You could take a look at that.
I had to open another application that was working and copy the permissions set up in services for the one that was working to the firewall setup.
Once they were set the same, it started working, it's possible that your problem could be something like that.
Mike