Download the Program

Preparation

Remove or disable all antivirus software on your PC (Windows Defender, Avast, Kaspersky, Nod32, McAfee, etc.).
Remove anti-cheat software: Valorant (Vanguard), FACEIT, ESEA, etc.
Make sure to install .NET Framework 4.6.2 if not already installed — download .NET Framework.
Make sure to install the latest Visual C++ Redistributable — download VC++.

Download Jarvis.exe (download link is available after purchasing the program).
Log in using your activation key (you won't need to enter the key next time).
Go to settings and specify the path to the game folder, for example: C:\Program Files (x86)\Steam\steamapps\common\PUBG.
Click the "Create Pak" button and wait until the program gives the command to launch the game.
After the game launches, enter a match and after landing press the "Hide Pak" button.

Important: Before each Jarvis launch, you must verify game file integrity in Steam. Verify files and restart the loader before every launch.

Program settings are saved (game path, selected parameters).
To change pak settings — click the "Edit Config" button (close the game first).
If you close the launcher — the game will be closed. While playing PUBG with Jarvis — do not close the launcher.

Error when launching PUBG — simply try again.
No effect in game after pak launch — close the game and try again.
Game minimizes — set the game mode to "Borderless" and restart the game.

Information from the developer about the safety of each feature category:

Painting — all painting features are completely safe.
Recoil compensation (Weapon tab) — safe if not combined with other weapon modification features.
Improved sounds (World tab) — safe.
Increased loot radius (Misc tab) — safe.

Everything else in the Misc tab (third person in first person, melee as ESP, see through walls, high jumps) — high chance of ban. Risk increases both from anti-cheat detection and from player reports when viewing replays.