One System Care Unwanted Application
Written by Tomas Meskauskas on (updated)
What is One System Care?
One System Care is presented as an application that helps to clean computer systems of various junk files - "OneSystemCare fully cares for your laptop and computer to protect it from unnecessary junk files and recurring issues by thoroughly scanning and inspecting its many components."
This functionality may seem legitimate and useful, however, One System Care is classed as a potentially unwanted program (PUP). The reasons for these negative associations are stealth installation and tracking of web browsing activity.
After system infiltration, One System Care gathers various Internet browsing-related information including IP addresses, websites visited, pages viewed, search queries - these are just some examples from long list of data types recorded by this PUP.
Some of this collected information will be personally identifiable - the developers of One System Care share this with third party companies who often misuse information to generate revenue. This behavior can lead to serious privacy issues or even identity theft. Therefore, the presence of One System Care on your system can lead to serious privacy issues or even identity theft.
This behavior is very common for various adware-type applications. As well as tracking users' browsing activity, these applications often cause unwanted browser redirects and display intrusive online advertisements, thereby significantly diminishing the Internet browsing experience. We strongly advise you to uninstall One System Care immediately.
| Name | One System Care potentially unwanted program |
| Threat Type | PUP (potentially unwanted program), PUA (potentially unwanted application) |
| Supposed Functionality | System optimization, registry cleaner, computer performance enhancer |
| Detection Names | Avira (ADWARE/Adposhel.Gen), Malwarebytes (Adware.Adposhel), Kaspersky (not-a-virus:AdWare.Win32.Agent.xxynue), Full List Of Detections (VirusTotal) |
| Symptoms | A program that you don't recall installing suddenly appeared on your computer. New application is performing computer scans and displays warning messages about found issues. Asks for payment in order to eliminate the supposedly found errors. |
| Distribution Methods | Deceptive pop-up ads, free software installers (bundling), fake flash player installers. |
| Related Domains | onesystemcare.com |
| Damage | Monetary loss (unnecessary purchase of fake software), unwanted warning pop-ups, slow computer performance. |
| Malware Removal (Windows) | To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Combo Cleaner. |
One System Care has similar characteristics to dozens of other deceptive applications also claiming to enhance the Internet browsing experience including, for example, PepperZip, Results Hub, and TheBrowser. All falsely promise to provide a number of useful features - these are attempts by PUPs to trick users to install.
Bear in mind that all adware is designed to generate revenue for the developers. Rather than providing any real value for users, apps such as One System Care display intrusive online advertisements and track Internet browsing activity.
How did One System Care install on my computer?
Research shows that many users install this application inadvertently. This is due to deceptive software marketing method called 'bundling' (stealth installation of third party apps with regular software/apps). The developers know that many users do not express enough caution when downloading and installing software - they rush these processes and skip most/all steps.
Therefore, bundled software is often hidden within the 'Custom' or 'Advanced' settings. By skipping this section, users expose their systems to risk of infection and put their privacy at risk.
How to avoid installation of potentially unwanted applications?
The key to computer safety is caution. Do not rush the download or installation processes. Bundled software (that should be cancelled) is mostly concealed and, therefore, it is important to closely analyze each step of the download and installation procedures.
Deceptive free software installers distributing One System Care:
Screenshot of One SystemCare potentially unwanted application:
Instant automatic malware removal:
Manual threat removal might be a lengthy and complicated process that requires advanced IT skills. Combo Cleaner is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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Quick menu:
- What is One System Care?
- STEP 1. Uninstall One System Care application using Control Panel.
- STEP 2. Remove adware from Internet Explorer.
- STEP 3. Remove deceptive add-ons from Google Chrome.
- STEP 4. Remove bogus plug-ins from Mozilla Firefox.
- STEP 5. Remove dubious extension from Safari.
- STEP 6. Remove rogue plug-ins from Microsoft Edge.
One System Care PUP removal:
Windows 11 users:
Right-click on the Start icon, select Apps and Features. In the opened window search for the application you want to uninstall, after locating it, click on the three vertical dots and select Uninstall.
Windows 10 users:
Right-click in the lower left corner of the screen, in the Quick Access Menu select Control Panel. In the opened window choose Programs and Features.
Windows 7 users:
Click Start (Windows Logo at the bottom left corner of your desktop), choose Control Panel. Locate Programs and click Uninstall a program.
macOS (OSX) users:
Click Finder, in the opened screen select Applications. Drag the app from the Applications folder to the Trash (located in your Dock), then right click the Trash icon and select Empty Trash.
In the uninstall programs window, look for "One System Care", select this entry and click "Uninstall" or "Remove".
After uninstalling the potentially unwanted program, scan your computer for any remaining unwanted components or possible malware infections. To scan your computer, use recommended malware removal software.
Remove adware from Internet browsers:
At time of research, One System Care did not install its browser plug-ins on Internet Explorer, Google Chrome, or Mozilla Firefox, however, it was bundled with other adware. Therefore, you are advised to remove all potentially unwanted browser add-ons from your Internet browsers.
Video showing how to remove potentially unwanted browser add-ons:
Remove malicious add-ons from Internet Explorer:
Click the "gear" icon 
(at the top right corner of Internet Explorer), select "Manage Add-ons". Look for any recently-installed suspicious browser extensions, select these entries and click "Remove".
Optional method:
If you continue to have problems with removal of the one system care potentially unwanted program, reset your Internet Explorer settings to default.
Windows XP users: Click Start, click Run, in the opened window type inetcpl.cpl In the opened window click the Advanced tab, then click Reset.
Windows Vista and Windows 7 users: Click the Windows logo, in the start search box type inetcpl.cpl and click enter. In the opened window click the Advanced tab, then click Reset.
Windows 8 users: Open Internet Explorer and click the gear icon. Select Internet Options.
In the opened window, select the Advanced tab.
Click the Reset button.
Confirm that you wish to reset Internet Explorer settings to default by clicking the Reset button.
Remove malicious extensions from Google Chrome:
Click the Chrome menu icon 
(at the top right corner of Google Chrome), select "Tools" and click "Extensions". Locate all recently-installed suspicious browser add-ons, select these entries and click the trash can icon.
Optional method:
If you continue to have problems with removal of the one system care potentially unwanted program, reset your Google Chrome browser settings. Click the Chrome menu icon 
(at the top right corner of Google Chrome) and select Settings. Scroll down to the bottom of the screen. Click the Advanced… link.
After scrolling to the bottom of the screen, click the Reset (Restore settings to their original defaults) button.
In the opened window, confirm that you wish to reset Google Chrome settings to default by clicking the Reset button.
Remove malicious plug-ins from Mozilla Firefox:
Click the Firefox menu 
(at the top right corner of the main window), select "Add-ons". Click "Extensions", in the opened window, remove all recently-installed suspicious browser plug-ins.
Optional method:
Computer users who have problems with one system care potentially unwanted program removal can reset their Mozilla Firefox settings.
Open Mozilla Firefox, at the top right corner of the main window, click the Firefox menu, in the opened menu, click Help.
Select Troubleshooting Information.
In the opened window, click the Refresh Firefox button.
In the opened window, confirm that you wish to reset Mozilla Firefox settings to default by clicking the Refresh Firefox button.
Remove malicious extensions from Safari:
Make sure your Safari browser is active, click Safari menu, and select Preferences....
In the opened window click Extensions, locate any recently installed suspicious extension, select it and click Uninstall.
Optional method:
Make sure your Safari browser is active and click on Safari menu. From the drop down menu select Clear History and Website Data...
In the opened window select all history and click the Clear History button.
Remove malicious extensions from Microsoft Edge:
Click the Edge menu icon 
(at the upper-right corner of Microsoft Edge), select "Extensions". Locate all recently-installed suspicious browser add-ons and click "Remove" below their names.
Optional method:
If you continue to have problems with removal of the one system care potentially unwanted program, reset your Microsoft Edge browser settings. Click the Edge menu icon (at the top right corner of Microsoft Edge) and select Settings.
In the opened settings menu select Reset settings.
Select Restore settings to their default values. In the opened window, confirm that you wish to reset Microsoft Edge settings to default by clicking the Reset button.
- If this did not help, follow these alternative instructions explaining how to reset the Microsoft Edge browser.
Summary:
Commonly, adware or potentially unwanted applications infiltrate Internet browsers through free software downloads. Note that the safest source for downloading free software is via developers' websites only. To avoid installation of adware, be very attentive when downloading and installing free software. When installing previously-downloaded free programs, choose the custom or advanced installation options – this step will reveal any potentially unwanted applications listed for installation together with your chosen free program.
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Outstanding!
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