Ars Technica ran a piece this week rounding up how ads and tracking have spread from smart TVs to computer monitors, and the case study doing most of the work is one that’s been building since July: LG monitors quietly installing an app that pushes McAfee pop-up ads, through Windows Update, with nothing on screen asking permission first. The Register, Windows Latest, Engadget and Slashdot all covered pieces of this over the past month, and the mechanism underneath it is more interesting, and more relevant to a work machine, than the ad itself.
What actually happened
Since at least 2024, some LG monitors have caused connected Windows PCs to silently install an app called the LG Monitor App Installer, delivered under cover of what looks like a routine driver update through Windows Update. Once installed, it’s been showing McAfee promotional pop-ups on login. Nobody clicked “install.” Nobody saw a permissions dialog. The app just arrived.
Gamers Nexus put out a video on it that got enough attention to reach Microsoft directly. In late July, Pavan Davuluri, Microsoft’s EVP of Windows and devices, said LG had agreed to disable the McAfee pop-up specifically. LG’s own changelog confirmed the app was doing this. That closes the one visible symptom. It does not close the mechanism that let it happen without your say-so, and reporting from Ubergizmo and others notes similar companion-app prompts showing up through Dell and Alienware monitors too, not just LG’s.
The part that’s actually the story: device metadata
Windows has a feature called device metadata. When you plug in a new peripheral — a monitor, a printer, sometimes a GPU — and the machine is online, Windows checks Microsoft’s servers for information tied to that hardware’s ID. Vendors can register a companion app against that ID through the Microsoft Store. If they have, Windows fetches and installs the app in the background, no prompt required, as part of what looks to the user like ordinary driver setup.
The conditions for this are the Windows defaults for most people, not an edge case: the machine needs to be online, signed into the Microsoft Store, and set up with Recommended Settings, which is what Windows suggests during first setup and what most consumer and prosumer installs run with. Vendors don’t need to trick anyone into anything. They just tag the metadata and Windows does the rest.
That’s the design LG’s ad happened to ride in on. It’s also, unresolved, the design any vendor could ride in on next, with something less obviously annoying than a pop-up and therefore less likely to end up in a Gamers Nexus video.
Why this is worth a second thought on a work machine
A gaming monitor picking up an unwanted ad app is an annoyance. A monitor you bought specifically for accurate colour — the kind of purchase a technical artist or anyone doing client-facing review work actually makes deliberately, calibrated and left alone — is a different case. The whole point of that machine is that you know what’s running on it and why. An app you didn’t install, tied to hardware you plugged in for a completely unrelated reason, is one more unknown variable sitting on a box that’s supposed to be predictable. It doesn’t have to be malicious to be a problem; it just has to be there, using cycles or popping a window mid-review, with no install log you’d have thought to check.
For a freelancer or a small studio, that machine is often also the render box or the one doing client screen-shares. You don’t want to find out a vendor’s “companion app” phoned home or threw a notification in the middle of a session you’re being paid to run cleanly.
What I’d actually do about it
Check before you plug in, not after. Windows Update’s advanced options include a setting for automatically installing apps associated with device metadata — turning that off means new hardware still gets its drivers, but stops silently pulling in whatever companion software the vendor has tagged alongside them. Worth doing once, on any machine you use for paying work, before your next monitor purchase rather than after you notice something you didn’t put there.
Audit what showed up after your last monitor swap. If you added a new display in the past year or two and never looked at what installed itself alongside the driver, it’s a five-minute check in Settings > Apps.
Don’t assume this is an LG problem specifically. LG got the press because the symptom was loud and Gamers Nexus went looking. The mechanism is a Windows feature available to any hardware vendor with a Microsoft Store listing, and Dell and Alienware have already shown up in the same reporting. Treat the fix as “know the setting exists,” not “avoid one brand.”
Sources: Ars Technica, The Register, Windows Latest, Engadget, and Ubergizmo on other affected brands.