I received two unexpected messages about unusual sign-ins on my Microsoft account, which really freaked me out. I opened one of the messages (not clicking any links) and got a popup saying that someone had access to my screen. The app mentioned was Google's default messaging service, and I didn't install any strange apps or find any suspicious ones when I checked. I scanned my device with Malwarebytes, and it came out clean. I also don't have the phone number linked to my Microsoft account, as I'm worried about SIM swapping. When I checked my account, there was no new sign-in activity and I have two-factor authentication set up. I shared my screen using Google Cast to show some photos on my TV earlier that night, which might have something to do with it. I force stopped Google Messages, uninstalled updates, and restarted my device. I don't see the popup anymore and can open the message again. Any advice or comments would be appreciated!
2 Answers
It’s totally understandable to be worried. One thing that could help is to check your Google activity dashboard for any unfamiliar devices or locations accessing your account. You can also revoke access to any apps you don’t recognize. Keeping your software updated and maintaining strong, unique passwords for each account can help prevent future issues.
It’s good that you’re being proactive! Sometimes, popups can be misleading. Since you mentioned Google Cast, consider logging out of any casting apps on all devices and resetting your router as well. This can help eliminate any potential access points. Also, you may want to run a second opinion security scan using a different antivirus tool, just to double-check.

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