However, if you are a competitive Rainbow Six Siege or For Honor player, . Deleting it forces a full file rescan, which can temporarily flag your game as "modified" and cause anti-cheat re-checks, potentially delaying your matchmaking.
When you download a large game (e.g., 80GB), the launcher splits the game into many small "packages" (PAK files). Each package has a unique hash—a digital fingerprint. gfpakhashcache.bin
Never use a third-party "cleaner" tool that promises to remove gfpakhashcache.bin permanently. Such tools often corrupt the Ubisoft Connect installation. Stick to the manual methods described above. Have more questions about mysterious cache files on your gaming PC? Check your other launchers—Steam, Origin, and GOG all have similar hidden .bin files doing the same work behind the scenes. However, if you are a competitive Rainbow Six
| Criteria | Legitimate file | Potential Malware | | :--- | :--- | :--- | | | C:\ProgramData\Ubisoft\Launcher\cache\ | Desktop, Downloads, C:\Windows\System32 | | Digital Signature | Signed by "Ubisoft" | Unsigned or fake signature | | Process using it | UbisoftConnect.exe or Uplay.exe | Unknown .exe with random name | | Behavior | Only runs when launcher is open | Runs at startup, high CPU, network activity | Each package has a unique hash—a digital fingerprint