Delta Executor Not Injecting: How to Fix It
The key worked, Delta opened, and Attach does nothing. Almost every case is one of five things, and the first is simply the order you opened the apps in.
First: get the launch order right
This alone fixes a large share of injection failures.
Delta has to be running before Roblox, and you have to attach after the game world has finished loading. Doing it in any other order breaks the attach step.
- Close everything. Fully close Roblox and Delta — not minimised, closed.
- Open Delta first. Let it finish loading.
- Complete the key step before touching Roblox. If it fails here, it is a key problem, not injection — see key not working.
- Launch Roblox from inside Delta where the build offers it, rather than from your home screen.
- Join a game and wait for it to fully load. Attaching on the loading screen fails.
- Then press Attach or Inject.
If the status still reads "Not Injected" after that, move on.
Roblox updated and your build has not
Roblox pushes client updates regularly. When it does, executors stop attaching until a matching build ships — usually within a day or two. This is the single most common cause of "it worked yesterday".
Check your version against the current release. If yours is older, update before changing anything else. If yours is current and injection still fails, the executor is probably waiting on a rebuild, and no amount of reinstalling will help until it arrives.
Antivirus is blocking the attach step
Windows and Mac only.
Injection is the exact moment security software intervenes. Delta can install and open perfectly, then get stopped the instant it tries to write into the Roblox process.
Add an exclusion for the Delta folder and try again. Do not disable protection altogether — some guides in this niche tell you to, and it is bad advice. The step-by-step is in the antivirus guide.
On Windows you may also need to run Delta as administrator. Without it, the process cannot get the handle it needs to attach.
The Microsoft Store version of Roblox will not work
PC only, and it catches a lot of people.
There are two Roblox builds on Windows: the one from the Microsoft Store and the one from Roblox's own website. Executors cannot attach to the Store version, because it runs inside a sandbox that blocks exactly this.
- Uninstall the Microsoft Store version of Roblox completely.
- Download the standard client from roblox.com/download.
- Install it, sign in, and join a game once to confirm it works on its own.
- Now run Delta and attach.
If you are running Delta through an Android emulator instead, the emulator itself usually needs to be started as administrator. Full setup on the PC page.
The install is corrupted
If the first four have not worked, reinstall cleanly rather than over the top.
Symptom to cause, at a glance
| What happens | Likely cause | Where to go |
|---|---|---|
| Attach does nothing at all | Wrong launch order | Section 1 |
| Worked yesterday, not today | Roblox client update | Section 2 |
| Delta closes when you press Attach | Antivirus or missing admin rights | Section 3 |
| Attaches, but scripts do nothing | Version mismatch with the client | Section 2 |
| Roblox closes after injecting | Anti-cheat detected the attach | Section 2, then ban risk |
| Nothing works, PC only | Microsoft Store Roblox | Section 4 |