Can anyone tell me what this file is referenceing? I tried to delete one of the useres from my computer and now it is telling me that that user does not exist and that I am getting the "program not responding" message and when I click on more info this is the name of the file that it says can't be found and goes into something like "MS (R) HTML Application Host can not be found. I just want it to stop before it drives me insane as it is not in any of my manuals.....

Here's what it is, but I can't help with your problem:
http://www.auditmypc.com/process/mshta.asp