It might not really be there, Windows just simulates you that it is there (and only Windows knows that, so other programs don't find it).
Look for it under C:\Users\YourUserName\AppData\Local\VirtualStore\...
.
That might solve your issue; if you want to understand why it is there, google File and Registry Virtualization.
In a nutshell, for access control reasons, Windows doesn't allow just every program to write in that area, so if an older program needs to writes there, it redirects the file to your virtual storage, but simulates continuously that is where you thought it is.