FFT is a simple tool that works to show a list of all recently modified files in a directory you specify (as a default it will be C:WINDOWS).
For example, after starting the Windows system, it can be difficult to know which files have been modified in a system directory, to detect possible dangers or irregularities.
You can also select a directory and a period of time (by default, an hour) and run a search via the "Find button" option. FFT is a program that takes up little space on your hard drive (about 9KB) and is totally free.