BrowserModifier:Win32/Prifou is a generic detection for threat that attacks widely used internet program like Google Chrome, Mozilla Firefox, Safari, or Edge. If a browser extension, plug-in, or add-on is identified as BrowserModifier:Win32/Prifou, it means that the said application possesses security risks and immediate removal of this threat is recommended. While under the influence of this virus, web user may experience different types of annoyances like pop-ups and redirects.

Threat Behavior

BrowserModifier:Win32/Prifou spreads as an integrated add-on to various freeware and third-party software. It could be that handlers of this virus are paying the freeware developers to accommodate the spread of BrowserModifier:Win32/Prifou or attackers themselves are repacking the cost-less program to include the malicious code.

Once the freeware is run on the computer, users are not informed on the installation of the inclusions. Therefore, the first symptom of the intrusion that will be visible to user is when anti-virus program issues an alert about the BrowserModifier:Win32/Prifou virus. Technically, this pertains to an adware called Price Fountain. However, it is observed that the same detection is used to identify adware with similar characteristics and payload.

Payload of BrowserModifier:Win32/Prifou

The main objective of this virus is to dominate the computer and replaced the existing settings on homepage, new tab, and search engine. After that, BrowserModifier:Win32/Prifou will start to make profit for its creators by launching ad campaign. Therefore, aggressive advertisements displaying in different forms and sizes will bother web users.

As long as BrowserModifier:Win32/Prifou is active on the browser program, computer user’s privacy is at risk. This virus was designed to take part in monitoring online activities and record sensitive information like search keywords, favourite websites, IP address, username, password, and contact details.


PUP.Optional.PriceFountain.A, Price Fountain, Adware.PriceFountain

How to remove BrowserModifier:Win32/Prifou?

To totally remove BrowserModifier:Win32/Prifou from the computer and get rid of relevant virus and trojan, please execute the procedures as stated on this page. Make sure that you have completely scan the system with suggested malware removal tools and virus scanners.

Remove BrowserModifier:Win32/Prifou Instantly

To instantly remove BrowserModifier:Win32/Prifou, we suggest that you scan the infected computer with this powerful anti-malware tool. It can detect and get rid of Trojans, viruses, malware, and adware from the infected computer. To fully protect the computer against BrowserModifier:Win32/Prifou or similar attack, you can activate Malwarebytes to have real-time scanning and complete defense against all forms of threats.

1. Download Malwarebytes Anti-Malware from the link below. Save the file on your hard drive.

2. Once the download completes, double-click on the file MBSetup.exe to run the program.

3. Select desired installation package whether for Personal Computer or Work Computer.

4. On next window, click Install button to proceed.

MBAM Default Install

5. Just proceed with the succeeding prompts until it start to execute the installation procedure.

6. Installation process will take less than a minute. It should run automatically after completing the setup.

7. When Malwarebytes Anti-Malware interface appears, please select Scan on the menu. The program will check for any available update before proceeding. Do not skip this step. Virus scan may take a while, please wait for the process to finish.


8. When scanning is done, Malwarebytes Anti-Malware will display the list of identified threats. Remove all and restart the computer to finalized the scan process.

After executing the above instructions, BrowserModifier:Win32/Prifou should have been eliminated totally from the computer. If there are still signs of infection or computer is displaying unusual behaviors, please continue with the remaining procedures.

Stage 1 : Start Windows in Safe Mode With Networking

Windows 10 Guide

1. Click on Windows logo and select Power icon when options pop-ups.
2. Select Restart from the options while pressing Shift key on the keyboard.
3. Choose an Option window will appear, select the Troubleshoot button.
4. On next window, please choose Advanced Option.
5. On Advanced Option window, click on Startup Settings and then, click Restart button to reboot the computer.
6. When Windows boot on Startup Settings, press function key F5 or number 5 on keyboard.

A simpler alternative for Windows 10 users is to scan the computer with Microsoft Defender Offline. This will run a virus scan in the recovery environment.

Windows 8 Guide

1. Click Windows Start icon at the lower left section of the screen.
2. Open Search window and type Advanced in the field. It will open General PC Settings.
3. Click on Advanced Startup and then, click on Restart Now button.
4. Once the computer starts in Advanced Startup option menu, select Troubleshoot.
5. Next, click on Advanced Options to reveal the next section.
6. Click Startup settings and then, click Restart button to boot the PC in Startup Settings.
7. Use function key F5 or number key 5 to Enable Safe Mode with Networking.

Stage 2 :Double Check with Microsoft Security Apps

Microsoft Windows has built-in security application that you can use to double-check if computer is still infected with BrowserModifier:Win32/Prifou. For Windows 8 and 10 users, please run Windows Defender. Users of Windows Vista and older versions can utilize Microsoft Security Essentials to remove BrowserModifier:Win32/Prifou virus.

Windows 8 / 10 Instructions:

Windows Defender is a free tool that was built help you remove BrowserModifier:Win32/Prifou, viruses, and other malicious items from Windows 8 or Windows 10 system. Follow these procedures to scan your computer with Windows Defender:

1. Tap or click the Search charm, search for defender, and then open Windows Defender.

If Windows Defender is not yet installed on the computer, please proceed to download page using the link below. It also contains detailed instruction to install and use the program effectively. Proper usage is required to totally remove BrowserModifier:Win32/Prifou


2. On the Home tab, click Full under Scan Options. Click Scan now to start scanning for presence of BrowserModifier:Win32/Prifou. The process may take a while to complete.


3. After the scan, delete/quarantine identified threats wether it is relevant to BrowserModifier:Win32/Prifou or not. You may now restart Windows to complete the virus removal process.

Windows XP, Windows Vista, and Windows 7 Instructions:

1. Open Microsoft Security Essentials by going to Windows Start > All Programs. If the tool is not yet installed on the computer, please download Microsoft Security Essentials from the link below. Save the file on your hard drive.

Complete installation guide and usage are also provided on the same link. It is essential in removing BrowserModifier:Win32/Prifou effectively. If Microsoft Security Essentials is already installed on the PC, please proceed with the steps below.

2. On Microsoft Security Essentials Home screen, please choose Full under Scan Options.

MSE Full Scan

3. Click on Scan Now button to start detecting BrowserModifier:Win32/Prifou items, viruses, and malware on the PC. Scan may take a while, please be patient and wait for the process to end.

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