You could try this - you will need to download defraggler, so may have to do so on different clean computer and transfer to your system with a flash drive. So take adequate precautions to prevent virus spread through flash drive having been connected to yr computer.
http://www.filehippo.com/download_defraggler/Anyways, once defraggler set up and is running, click Analyze for a reading of your system drive (Drive C: - for most people)
This should bring the difficult file to surface - click View Files and look under Filename column for the file.
(screenshot shows files in Content.IE5 on this computer highlighted by red arrows - I will choose file 'prototype [1].js' as my example)
If the file is located, rightclick the file and choose Open Containing Folder.
This will give you a tree hierarchy of your computer in a left hand pane and the files contained in the Folder in a right hand pane. (next screenshot shows file and containing folder in red circles with a red line connected the two. You will now be able to take action)
I have found this method to be one of the best ways to search for files that are contained in Content.IE5 location.
I'm sending this through from a clients computer, so now I continue to clean up his system. This folder 7AI3X128 can be deleted as it it superfluous to the smooth running of the system.
Edited post -