PUP.ConduitD is a potentially unwanted program classified as a browser hijacker and adware component that typically arrives bundled with free software downloads. This threat originated from the notorious Conduit family of browser extensions and toolbars, which at their peak infected millions of computers worldwide by manipulating browser settings and injecting advertisements into web pages. While not technically a virus in the traditional sense, PUP.ConduitD exhibits aggressive behavior that can significantly degrade system performance, compromise your privacy by tracking browsing habits, and expose you to additional security risks through forced redirects to questionable websites.
The "PUP" designation stands for Potentially Unwanted Program—a category that reflects how these applications rarely arrive through explicit user consent. Instead, they exploit deceptive installation practices that bury critical disclosure language in lengthy terms-of-service agreements or use pre-checked boxes during software installations. Once established on your system, PUP.ConduitD modifies browser configurations to redirect your searches, change your homepage and new tab settings, and display intrusive advertisements that generate revenue for its operators through pay-per-click schemes.
Threat Profile
| Attribute | Details |
|---|---|
| Family | Conduit (browser hijacker/adware family) |
| Classification | PUP (Potentially Unwanted Program), Browser Hijacker, Adware |
| Aliases | Conduit Toolbar, SearchProtect, Search.conduit.com, ValueApps, PUP.Optional.Conduit |
| Platform | Windows (all versions from XP through 11); browser extensions affect Chrome, Firefox, Edge, Internet Explorer |
| First Discovered | Conduit family active since approximately 2005; specific variants evolved through 2015 |
| Distribution Method | Software bundling, fake download buttons, compromised installers, social engineering |
| Persistence Mechanisms | Browser extensions, scheduled tasks, registry Run keys, helper services, browser policy manipulation |
| Primary Capabilities | Homepage/search engine hijacking, search redirection, advertisement injection, user tracking, affiliate fraud |
| Data Collection | Browsing history, search queries, clicked links, IP addresses, potentially form data and shopping habits |
| Network Behavior | Connects to adware servers for ad delivery and tracking; typical domains include conduit.com variants, valueapps domains, and various content delivery networks |
| Common Artifacts | Browser extensions with randomized names, folders in %LOCALAPPDATA% and %PROGRAMFILES%, modified browser shortcuts with appended parameters |
| Removal Difficulty | Moderate—uses multiple persistence methods and may reinstall components if not thoroughly cleaned |
How It Spreads
PUP.ConduitD primarily spreads through software bundling, a distribution tactic where the unwanted program piggybacks on legitimate free software installations. When you download a free utility, media player, or PDF converter from certain download sites, the installer often includes optional offers for additional software. These offers are frequently presented in a deliberately confusing manner—buried on a secondary screen, written in small gray text, or pre-selected with a checkbox you must manually uncheck to decline. Many users click through installation wizards using the default "Next" button without reading each screen carefully, inadvertently agreeing to install browser toolbars and search hijackers alongside the software they actually wanted.
Another common vector involves deceptive advertising on file-sharing and torrent sites. These pages often display multiple "Download" buttons designed to confuse visitors about which button actually downloads the intended file. The fake buttons—typically larger and more prominent than the legitimate download link—lead to installers that bundle PUP.ConduitD with other unwanted software. These malicious advertisements may also appear on compromised legitimate websites where attackers have injected malicious code into the site's advertising network.
Distribution methods for this threat include:
- Software bundling with free utilities — download managers, video converters, codec packs, and system optimizers commonly bundle Conduit components
- Fake download buttons on file-sharing sites, torrent portals, and software repositories that present larger, more visible fake download links
- Compromised browser extensions that appear legitimate but include hidden hijacker functionality or get updated maliciously after installation
- Malicious advertisements (malvertising) on legitimate websites that push fake software updates or security warnings
- Fake update notifications claiming to be Flash Player, Java, or browser updates when they actually install PUPs
- Repackaged installers for popular software available on third-party download sites rather than official developer websites
- Email attachments disguised as invoices, shipping notifications, or document sharing that bundle the hijacker with macro-enabled documents
What It Does On Your Machine
Once installed, PUP.ConduitD immediately targets your web browsers to establish control over your online experience. The hijacker modifies browser settings without explicit permission, changing your default homepage to a Conduit-controlled search page, redirecting your new tab page to advertising-laden portals, and replacing your default search engine with one that inserts sponsored results at the top of search listings. These changes persist even if you manually reset them through browser settings, as the hijacker continuously monitors and reverts any modifications you attempt to make.
The adware component injects advertisements directly into web pages you visit, even on sites that don't normally display ads. You'll notice banner ads appearing in unusual locations, in-text advertising that underlines random words and shows pop-up ads when you hover over them, and interstitial advertisements that force you to wait several seconds before viewing the page you requested. These ads are not merely annoying—they represent a security risk because the Conduit network doesn't rigorously vet advertisers, meaning you may be exposed to scams, additional malware downloads, or phishing pages designed to steal credentials.
Behind the scenes, PUP.ConduitD establishes multiple persistence mechanisms to survive removal attempts and system restarts. The program creates scheduled tasks that reactivate components if they're deleted, modifies Windows registry keys to launch at startup, and may install a background service that monitors browser activity continuously. Browser shortcuts on your desktop and taskbar get modified with appended command-line parameters that force the browser to load hijacker pages regardless of your settings.
The privacy implications are significant. PUP.ConduitD tracks your browsing behavior extensively, recording which websites you visit, what search terms you enter, which links you click, and how long you spend on various pages. This data gets transmitted to remote servers where it's analyzed to build detailed profiles of your interests, shopping habits, and online behavior. While the operators claim this tracking serves to deliver "relevant" advertisements, the data collection occurs without meaningful consent and may be shared with or sold to third-party advertising networks. In some cases, variants have been observed capturing form data, which could potentially include sensitive information entered into web forms before you submit them.
Manual Removal — Step by Step
Disconnect from the Network
Before beginning removal, disconnect your computer from the internet by unplugging the Ethernet cable or disabling Wi-Fi. This prevents PUP.ConduitD from communicating with remote servers, downloading additional components, or receiving instructions that might interfere with cleanup. It also protects your privacy by stopping data transmission during the removal process.
Boot Into Safe Mode with Networking
Restart your computer and enter Safe Mode, which loads Windows with minimal drivers and services. On Windows 10/11, hold Shift while clicking Restart, then navigate to Troubleshoot > Advanced Options > Startup Settings > Restart, and press F5 for Safe Mode with Networking. Safe Mode prevents many malware components from loading automatically, making them easier to remove. The "with Networking" option allows you to download removal tools if needed.
Uninstall Suspicious Programs
Open Control Panel > Programs and Features (or Settings > Apps on Windows 10/11) and carefully review the installed programs list. Look for entries containing "Conduit," "SearchProtect," "ValueApps," or unfamiliar programs installed around the same date you noticed the hijacking symptoms. Uninstall anything suspicious, paying special attention to programs you don't remember installing yourself. Some variants use generic names like "Toolbar" or "Helper" to avoid detection.
Remove Browser Extensions
Open each installed browser and remove hijacker extensions. In Chrome, go to Settings > Extensions; in Firefox, select Add-ons > Extensions; in Edge, click Extensions from the menu. Remove any extensions you don't recognize, especially those installed recently that you didn't authorize. Pay particular attention to extensions with vague names, no reviews, or permissions that seem excessive for their stated purpose. Disable or remove anything associated with Conduit, search tools, or shopping assistants you didn't intentionally install.
Clean Scheduled Tasks
Press Windows+R, type "taskschd.msc" and press Enter to open Task Scheduler. Expand Task Scheduler Library and look for tasks with names like "ValueApps Update," "Conduit," or randomly-named tasks with suspicious trigger schedules. Right-click any suspicious tasks and select Delete. Check what program each task runs before deleting—legitimate Windows tasks won't reference folders in your user AppData directory or Program Files locations with vendor names you don't recognize.
Remove Registry Persistence
Press Windows+R, type "regedit" and press Enter to open Registry Editor. Navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run and HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run. Look for entries pointing to Conduit-related executables or unfamiliar programs in your AppData\Local folder. Right-click and delete suspicious entries. Also check HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome (or equivalent browser paths) for hijacked browser policies and delete the entire Policies key if it contains only hijacker settings.
Delete Program Files and Folders
Open File Explorer and navigate to C:\Program Files (x86)\ and C:\Users\[YourUsername]\AppData\Local\. Look for folders named Conduit, SearchProtect, ValueApps, or any folders you identified in the previous steps. Delete these entire folders. If Windows says the files are in use, you may need to restart and try again from Safe Mode. Also check your browser's user data folders for extension remnants using paths like C:\Users\[YourUsername]\AppData\Local\Google\Chrome\User Data\Default\Extensions\ and delete folders with suspicious random-character names.
Reset Browser Settings
In each affected browser, perform a settings reset. In Chrome, go to Settings > Reset and clean up > Restore settings to their original defaults. In Firefox, select Help > More troubleshooting information > Refresh Firefox. In Edge, choose Settings > Reset settings > Restore settings to their default values. This removes hijacked homepage, search engine, and startup page settings. After resetting, manually configure your preferred homepage and search engine to ensure they're set correctly.
Scan with Malwarebytes
Download and install Malwarebytes (from malwarebytes.com only—avoid download sites). Run a full Threat Scan, which typically takes 30-60 minutes depending on your drive size. Malwarebytes excels at detecting PUPs and browser hijackers that traditional antivirus might miss. Quarantine everything it finds, then restart your computer. Consider running a second scan after restart to verify complete removal, as some variants install multiple components that may resurrect each other.
Verify Removal and Change Passwords
Restart your computer normally (not in Safe Mode) and reconnect to the internet. Open your browsers and verify that your homepage, new tab page, and search engine settings remain as you configured them. Visit a few websites and confirm no unexpected ads appear. Because PUP.ConduitD tracks browsing activity and may capture form data, change passwords for important accounts—especially banking, email, and social media—using a clean browser or device before entering credentials on your cleaned computer.
Prevention
- Download software only from official sources — Avoid third-party download sites like download.com, softonic, or CNET Downloads. Instead, get software directly from the developer's official website. These reputable sources rarely bundle unwanted programs with their downloads.
- Choose Custom or Advanced installation — Never click through installers using the Express or Recommended options. Always select Custom or Advanced installation, then carefully read each screen. Uncheck any boxes offering to install additional software, change your homepage, or install browser toolbars.
- Keep a reputable anti-malware tool installed — Run real-time protection from a trusted security suite that includes anti-PUP detection. Free versions of Malwarebytes or Windows Defender provide baseline protection, though paid solutions offer more comprehensive coverage. Keep definitions updated automatically.
- Install an ad-blocker with malware protection — Browser extensions like uBlock Origin not only block annoying ads but also prevent malicious advertisements that distribute PUPs. These tools include filter lists that block known malware distribution domains.
- Enable browser security features — Turn on Safe Browsing in Chrome/Edge or Enhanced Tracking Protection in Firefox. These features warn you before visiting known malicious sites and block some drive-by downloads.
- Update everything regularly — Keep Windows, browsers, and all software current with security patches. Enable automatic updates when available. Many PUPs exploit outdated software vulnerabilities to install without triggering User Account Control prompts.
- Be skeptical of pop-up warnings — Legitimate software companies don't use pop-up windows to notify you about infections or needed updates. If you see a pop-up claiming your system is infected or that Flash/Java needs updating, close it immediately and never click links within the warning.
- Review installed extensions monthly — Make it a habit to audit your browser extensions regularly. Remove anything you don't actively use or don't remember installing. Extensions can be updated maliciously after installation, so even previously safe extensions may become compromised.
When Computer Repair Roswell cleans PUP.ConduitD or any other malware from your system, we stand behind our work with a 90-day warranty. If the same infection returns within 90 days, bring it back and we'll re-clean it at no charge. We also provide detailed prevention guidance specific to how your machine got infected so you can avoid future problems.
Bring It In
While the manual removal steps above work for straightforward infections, PUP.ConduitD often installs alongside other unwanted programs in a bundle, creating a more complex cleanup situation. You might successfully remove the obvious Conduit components only to discover your browser still behaves strangely because of companion adware or a different hijacker that came in the same package. Our technicians at Computer Repair Roswell have specialized tools and experience with these bundled infections that allow us to identify and remove all components in a single comprehensive cleaning—usually within a few hours.
We're located right here in Roswell at 1660 Mansell Road, Suite A, and we handle most browser hijacker removals same-day. Our flat-rate malware removal service means you know the cost upfront—no hourly billing that increases with complicated infections. We'll also check for signs of more serious threats that sometimes hide alongside PUPs, optimize your system performance, and show you exactly what was on your machine and how it got there. Call us at (770) 679-9485 or stop by during business hours. No appointment necessary for diagnostics, and we'll give you an honest assessment of whether you need professional help or if your own cleanup efforts have already solved the problem.