Getting a count of volume shadow copies
Windows creates volume shadow copies from time to time, that you can use to retrieve copies of delete files.
VSCMount, available here, is a tool that helps you check to see if volume shadow copies are available. A script like this one for VSCMount:
C:\FooFolder\vsc\VSCMount.exe --dl E --mp C:\VSCs
. . . should be run in PowerShell in admin mode.