Specs
If Fortnite runs, you are in
CPU is rarely the story. Close the game. Point at the real install. That is the spec list.
OS
Windows 10 or 11, 64-bit.
Game
Fortnite via Epic Games Launcher with finished paks. GeForce Now and Xbox Cloud have nothing to rewrite.
Disk
Do not aim the tool at a half-downloaded update.
Steam Fortnite?
Fortnite on PC is Epic. There is no Steam pak folder.