PUABundler:Win32/Rostpay is a detection for a potentially unwanted program (PUP) that can have a negative effect on the computer once installed. Normally, programs detected as PUABundler:Win32/Rostpay are those apps that are integrated into legitimate software. While the host program itself is valid, any bundled products from different developers can result in misbehavior or conflicts. So, to protect the computer from this unwanted installation of third-party apps, antivirus programs alert users about the malicious software installer package and identify it as PUABundler:Win32/Rostpay.

Illustration for PUABundler:Win32/Rostpay

How does it infect the computer?

PUABundler:Win32/Rostpay is spread via online promotions, especially advertisements and email campaigns. Installing the program itself may not harm the computer because it is deemed legitimate. However, there are occasions wherein other products that come with it may not have the same reputation and could cause damaging effects on the computer. The reason for creating such bundled apps is to promote them by integrating with host software and running a simultaneous installation. Basically, programs identified as PUABundler:Win32/Rostpay are taking advantage of a sneaky approach to entering the computer.

Users have the option to opt out of the installation of files that are identified as PUABundler:Win32/Rostpay. However, some users can accidentally install the bundled applications when running the setup while disregarding the options provided during the installation.

How does this malware operate?

The main objective of PUABundler:Win32/Rostpay is simply to install the supplementary software. Obviously, the developers are involved in a pay-per-install campaign, and they receive revenue from those software providers by incorporating the installer files into the main application. As mentioned, PUABundler:Win32/Rostpay does not require the compulsory installation of third-party applications because it provides options for users to opt out.


In cases where PUABundler:Win32/Rostpay has infected the computer, users may notice several symptoms. One of which is the significant slowdown in overall system performance, especially with affected applications taking longer to load or respond. Additionally, users may encounter unexpected crashes or freezes on applications due to a lack of system resources. Aggressive types of pop-up ads and redirects while browsing the internet could also be a sign of PUABundler:Win32/Rostpay infection.

Moreover, the infected computer may exhibit changes in the browser settings, such as a modified homepage or default search engine. This can lead to unwanted redirects to suspicious websites. Furthermore, if you observe unexplained data usage or network activity, it could be a sign of PUABundler:Win32/Rostpay communicating with external servers.

For more help

PUABundler:Win32/Rostpay falls within the category of unwanted programs. To explore more threats belonging to this group, refer to the PUA list of malware.

How to remove PUABundler:Win32/Rostpay?

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

Quick Fix - Scan the PC with Combo Cleaner for Windows

Combo Cleaner is a trusted PC security and optimization tool equipped with a powerful virus and malware detection engine. This program can get rid of hazardous viruses like PUABundler:Win32/Rostpay through this procedure.

1. Download the application from the following page:

2. Save the file to your preferred location.

3. Double-click the downloaded file CCSetup.exe and install with the default settings.

CC for Windows Installation

4. At the end of the setup process, click Finish to run Combo Cleaner.

5. The tool will update the signature file, please wait for this process to complete.

6. To begin checking for threats like PUABundler:Win32/Rostpay, click on the Start Scan button. Wait for this scan to finish.

CC for Windows Start Scan

7. At the end of the scan process, click on Remove all threats to delete the PUABundler:Win32/Rostpay virus, including all malicious objects from the computer.

To fully optimize the features of antivirus and privacy scanners, users may have to upgrade to the premium version.

Please continue with the succeeding removal procedures if you are comfortable manually getting rid of the virus and malicious items linked to it.

Step 1 : Start Windows in Safe Mode With Networking

The method of running Windows in Safe Mode before running a virus scan is effective in getting rid of PUABundler:Win32/Rostpay. This process can prevent most viruses and malware from loading, making it easier to detect and remove them.

1. On the Windows Search bar, please type msconfig.

Screenshot of MSConfig Command

2. Select and open System Configutation on the list of found results.

3. Once you are in the System Configuration window, go to the Boot tab.

Screenshot of SafeBoot

4. Under the Boot Options area, please check Safe Boot and select Network. This will allow Windows to boot in Safe Mode with Networking.

5. Lastly, click on Apply and OK to save the changes.

6. Please restart Windows.

Do not forget to restore the normal boot process of Windows after running the virus scan. Simply repeat the method above, and this time, uncheck the Safe Boot option to run Windows normally.

Step 2 : Run Sophos Home Virus Scanner

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

1. Please click on the link below to download the program.

2. After downloading, locate the file SophosInstall.exe in the Downloads folder.

3. Install by double-clicking on the file.

4. If it prompts "Do you want to allow this app to make changes on your device?" please click Yes.

5. Next, it will display the Terms and Conditions page. Click the Install button to begin.

Screenshot of Sophos Home Terms and Conditions

6. Run the installation with the default settings. Please note that an internet connection is required in order to download important updates.

7. After finishing the installation, you must login to the dashboard. If you already have a Sophos account, please login. Otherwise, please enter your details and click on the Create Account button.

8. Once you are in the Sophos Home dashboard, click the Scan button to start checking the computer for PUABundler:Win32/Rostpay components.

Screenshot of Sophos Home Dashboard

9. Scanning may take a while; please wait for this process to finish.

10. After scanning the computer, Sophos Home will start cleaning or deleting files infected with PUABundler:Win32/Rostpay.

11. You may now close Sophos Home. The computer is now free from PUABundler:Win32/Rostpay, as well as associated malware and viruses.

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

Another alternative for Windows 10/11 users is to scan the computer with Microsoft Defender Offline. This will run a virus scan in the recovery environment.

Step 3 : Double Check with Windows Security Apps

Microsoft Windows has a built-in security application that you can use to double-check if your computer is still infected with PUABundler:Win32/Rostpay. For Windows 10/11 users, please run Windows Security.

Windows 10 / 11 Instructions:

Windows Security is a free tool that was built to help you remove PUABundler:Win32/Rostpay, viruses, and other malicious items from Windows 10/11 systems. Follow these procedures to scan your computer with the tool:

1. Tap or click the Search charm, search for Windows Security, and then open the application.

Image of Windows Security Search

2. On the Home tab, click Virus and threat protection from the sidebar.

3. On the main window, click on Scan Options. Then, click on Full Scan button.

Image of Scan Options

4. Lastly, click on the Scan now button to start scanning for the presence of PUABundler:Win32/Rostpay. The process may take a while to complete.

5. After the scan, Delete/Quarantine identified threats, whether they were relevant to PUABundler:Win32/Rostpay or not. You may now restart Windows to complete the virus removal process.

For older versions of Windows, you can scan the computer for free with the Microsoft Malicious Software Removal Tool (MSRT 64-Bit). It is a stand-alone virus scanner tool that targets prevalent malware groups.

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