How to remove pop-up windows on an Android phone Redmi 9

Smartphone owners Xiaomi often encounter intrusive advertising that suddenly appears on top of the desktop or in the browser. This is not only annoying, but may also indicate the presence of malicious code on the system. If you notice that pages open spontaneously on your Redmi 9 or banners appear, you need to act immediately.

The reasons for this problem can be different: from system settings of the shell itself MIUI to the installation of dubious applications from third-party sources. In this article, we will analyze all possible methods of dealing with annoying notifications and teach you how to protect your device from re-infection.

We will look at both standard system tools and deeper cleaning methods that will help restore comfort to using your gadget. Let's start with the simplest and most obvious steps that do not require special technical knowledge.

Disabling MIUI system advertising

The first thing you need to do is disable the company's built-in advertising services Xiaomi. The developers have integrated a recommendation system (MSA), which is responsible for displaying promotional materials in system applications. Without disabling this service, the fight against windows will be ineffective.

Go to the phone settings and find the item Passwords and security. Next, go to section Access to personal data. In the list of applications, find msa (MIUI System Ads) and switch the slider to the inactive position. The system will warn you about the consequences, but this is necessary to remove advertising.

It is also worth disabling personalization of advertising in the section Privacy. Click on the item Advertising services and select the option Disable ad personalization. This action will not remove ads completely, but will make them less intrusive and tied to your interests.

⚠️ Attention: After disabling the service msa you may need to wait 10 seconds before the confirmation button becomes active. Do not close the settings window ahead of time.

Do not forget that the interfaces of different versions MIUI may differ slightly. If you do not find the specified item, use the settings search by entering the word "advertising" or "msa".

Search and remove miner viruses

Often the source of pop-up windows is hidden malicious applications. They can disguise themselves as useful utilities: flashlights, QR code scanners, or memory cleaners. Such apps often do not have an icon in the menu, which makes them difficult to detect.

To identify suspicious software, go to Settings → Applications → All applications. Please review the entire list carefully. Look for apps without a name or with a blank icon. If you find such an element, immediately click on it and select Delete.

Another sign of a virus is an application that you did not install, but which is actively consuming the battery. Go to the Battery and performance section and look at energy consumption statistics. Suspicious processes with high consumption should be checked first.

Use the built-in security scanner from Xiaomi. Open the application Securitythat is preinstalled on the device and run the scan. It can detect known threat signatures and suggest ways to eliminate them.

Configuring notifications in the Chrome browser

A huge amount of advertising comes through the browser in the form of push notifications. Users often accidentally allow sites to show notifications by clicking "Allow" when visiting questionable resources. This leads to banners appearing even when the browser is closed.

To correct the situation, open the browser Google Chrome on your Redmi 9. Click on the three dots in the upper right corner and select Settings. Go to the section Notifications or Site settings → Notifications.

You will see a list of sites that are allowed to send notifications. Study it carefully and disable all suspicious resources. It is best to select the option Clear and reset permissionsto block everything, and then manually allow only trusted sites.

Notification type	Source	Action	Risk
Push banner	Dating site	Block	High
System	Software update	Allow	Low
Marketing	Online store	Disable	Medium
Spam	Unknown domain	Block	Critical

After clearing the list, restart your browser. This will help clear cached scripts that might be causing windows to reappear.

What to do if ads return?

If ads appear again after clearing, you may have a news aggregator application installed on your phone. Check the widgets on your desktop and remove any that you did not knowingly install.

Reset advertising identifier settings

Each Android device has a unique advertising identifier (GAID) that is used to target ads. Resetting this ID helps break the connection between your device and the advertising networks that collect data about your preferences.

Go to Settings → Google → Advertising. Click on the button Reset advertising identifier. Confirm the action in the pop-up window. This will not delete your data, but will make your profile less recognizable to advertising algorithms.

Here you can also activate the option Disable ad personalization. This will tell Google not to use your data to tailor ads. The effect may not be immediate, but over time the number of targeted advertisements will decrease.

⚠️ Attention: Resetting the identifier is not a panacea for viruses. This is only a privacy measure that helps reduce the volume of legal targeted advertising.

It is recommended to perform this procedure periodically, especially if you notice a sharp increase in the number of advertising offers in applications.

Checking device administrator rights

Some malware gains device administrator rights, which allows them to block their removal in the usual way. If the "Delete" button is inactive or the application appears again after cleaning, this is the problem.

Go to Settings → Passwords and security → Privacy → Special permissions → Device administrator applications. Here you will see a list of apps that have elevated privileges.

If you see here an unknown application or app with suspicious name (for example, "System Update", "Flash Player", etc.), uncheck it. After that, return to the general list of applications and delete it using the standard method.

Often viruses are disguised as system processes. Pay attention to the installation date: if the application was installed recently and you do not remember this moment, this is a cause for concern.

Radical measures: full reset of settings

If none of the above methods helped remove pop-up windows on Redmi 9, malicious code is probably deeply integrated into the system. In this case, the only reliable solution is a full reset to factory settings.

Before starting the procedure, be sure to create a backup copy of your important data: photos, contacts and documents. Use Google Drive or connect your phone to your computer via a USB cable. Remember that after the reset, all information will be deleted.

To perform a reset, go to Settings → About phone → Reset settings → Delete all data. Confirm the action and wait for the reboot. The phone will return to the state it was in when purchased.

Settings → About phone → Reset settings → Delete all data

After turning on, do not restore applications from a backup copy immediately. Install only the essentials and watch the system work. If advertising does not appear, it means that the problem was in one of the previously installed applications.

Why do advertisements appear even after deleting the application?

Some applications leave behind a cache or services that continue to work in background. It is also possible that you have several infected apps installed and you have removed only one of them.

Is it safe to use third-party antiviruses on Redmi 9?

The built-in defender MIUI is quite effective. Third-party antiviruses can slow down the system and display ads themselves. Use them only as a last resort, choosing trusted brands like Dr.Web or Kaspersky.

Can a pop-up window be a system error?

Sometimes failures in the launcher or a specific application can simulate pop-up windows. This is usually solved by clearing the cache of the problematic application or updating the firmware.

How to distinguish a system notification from an advertisement?

System notifications usually have a standard design MIUI and come from well-known applications. Advertising windows often have a bright, flashy design, “You have won” buttons or lead to third-party sites.