The .bat refers to it being a "batch" file which is a text file the command interpreter will recognize and run line by line. If you did not install anything recently, it might be suspicious so, hopefully, you have a good anti virus program that is current and some pest control utilities as well and have run them. I would not launch the batch file but you can usually bring them into a word processor and view the contents line by line. Somewhere, you should find an executable file that runs a program. If it's not one you recognize, I would get rid of it.
Somehow this crazy thing is on my desktop and wondering what it is and if this is the reason that on my Family Tree Maker genealogy program I can not change my fonts. It looks like it is a font thing but I am afraid to mess with it as I could get in deeper trouble then I am. I have contacted FTM and they have walked me through what they know to do and still the font is about a size 3. I run Windows 98SE and IE. Thanks

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