Does Windows 10 have a duplicate file finder?
Windows 10 doesn't have a built-in duplicate file finder, so getting a third-party program to find duplicate files will save you a lot of frustration, while reclaiming valuable disk space.
Why is my computer making duplicate files?
Duplicates are generally created in three ways; you download them, third-party apps create them during installation, or the operating system makes a duplicate system file to keep things running smoothly. Depending on how both apps and the OS create duplicates, they may or may not be safe to delete.