Security Stronghold security made easy

How to remove Down Checker (ads, banners, deals)



Threat's profile Threat indicator: HIGH

Name of the threat:Down Checker

Command or file name:DownChecker.dll

Threat type:Adware

Affected OS:Win32/Win64 (Windows XP, Vista/7, 8/8.1, Windows 10)

Affected browsers:Google Chrome, Mozilla Firefox, Internet Explorer, Safari

Down Checker - is a rogue browser extension, which is developed by cyber crooks. It may be embedded into popular browsers, Google Chrome, Internet Explorer and Mozilla Firefox. Authors of this extension claim, that Down Checker helps user to update his programs. However, Down Checker is classified as potentially unwanted software. Why? Because it displays various advertisements on visited webpages. It is highly recommended to remove Down Checker from computer.


Down Checker intrusion method

Down Checker

Down Checker installs on your PC along with free software. This method is called "bundled installation". Freeware offers you to install additional module (Down Checker). Then if you fail to decline the offer it starts hidden installation. Down Checker copies its file(s) to your hard disk. Its typical file name is DownChecker.dll. Then it creates new startup key with name Down Checker and value DownChecker.dll. You can also find it in your processes list with name DownChecker.dll or Down Checker. Also, it can create folder with name Down Checker under C:\Program Files\ or C:\ProgramData. If you have further questions about Down Checker, please ask below. You can use programs to remove Down Checker from your browsers below.


Download Removal Tool

Download this advanced removal tool and solve problems with Down Checker and DownChecker.dll (download of fix will start immediately):

Download WiperSoft Antispyware to remove Down Checker

* WiperSoft Antispyware was developed to remove threats like Down Checker in automatic mode. Remover has active module to protect PC from hijackers, trojans, ransomware and other viruses. Trial version of Wipersoft provides detection of computer viruses for FREE. To remove malware, you have to purchase the full version of Wipersoft.


Features of WiperSoft Antispyware Malware Remediation Tool

  • Removes all files created by viruses.
  • Removes all registry entries created by viruses.
  • You can activate System and Network Guards and forget about malware.
  • Can fix browser problems and protect browser settings.
  • Removal is guaranteed - if Removal Tool fails ask for FREE support.
  • 24/7 Spyware Helpdesk Support included into the package.

Download Stronghold AntiMalware by Security Stronghold LLC

Download antimalware designed specifically to remove threats like Down Checker and DownChecker.dll (download of fix will start immediately):

Download AntiMalware to remove Down Checker

Features of Stronghold Antimalware

  • Removes all files created by Down Checker.
  • Removes all registry entries created by Down Checker.
  • Fixes browser redirection and hijack if needed.
  • "Toolbar Remover" tool will help you get rid of unwanted browser extensions.
  • Removal is guaranteed - if Stronghold AntiMalware fails ask for FREE support.
  • 24/7 Helpdesk Support and 5 hours of Remote Support via GoToAssist included into the package.


We noticed that you are on smartphone or tablet now, but you need this solution on your PC. Enter your email below and we’ll automatically send you an email with the downloading link for Down Checker Removal Tool, so you can use it when you are back to your PC.

Privacy Policy


Let our support team solve your problem with Down Checker and remove Down Checker right now!

Submit support ticket below and describe your problem with Down Checker. Support team will offer you solution in several minutes and give a step-by-step instruction on how to remove Down Checker. Trouble-free tech support with over 10 years experience removing malware.
Submit support ticket

Software Industry Professionals Member Threat's description and solution are developed by Security Stronghold security team.

Here you can also learn:


How to remove Down Checker manually

This problem can be solved manually by deleting all registry keys and files connected with Down Checker, removing it from startup list and unregistering all corresponding DLLs. Additionally missing DLL's should be restored from distribution in case they are corrupted by Down Checker.

To get rid of Down Checker, you should:

1. Kill the following processes and delete the appropriate files:

no information

Warning: you should delete only those files which checksums are listed as malicious. There may be valid files with the same names in your system. We recommend you to use WiperSoft Antispyware Malware Remediation Tool for safe problem solution.

**Trial version of Wipersoft provides detection of computer viruses for FREE. To remove malware, you have to purchase the full version of Wipersoft.

2. Delete the following malicious folders:

no information

3. Delete the following malicious registry entries and\or values:

no information

Warning: if value is listed for some registry entries, you should only clear these values and leave keys with such values untouched. We recommend you to use WiperSoft Antispyware Malware Remediation Tool for safe problem solution.


Uninstall Down Checker related programs from Control Panel

We recommend you to check list of installed programs and search for Down Checker entry or other unknown and suspicious programs. Below are instructions for different version if Windows. In some cases adware programs are protected by malicious service or process and it will not allow you to uninstall it. If Down Checker won't uninstall or gives you error message that you do not have sufficient rights to do this perform below instructions in Safe Mode or Safe Mode with Networking or use WiperSoft Antispyware Malware Remediation Tool.


Windows 10

  • Click on the Start menu and choose Settings
  • Then click on System and choose Apps & Features in the left column
  • Find Down Checker under in the list and click Uninstall button near it.
  • Confirm by clicking Uninstall button in opened window if necessary.

Windows 8/8.1

  • Right click on the bottom left corner of the screen (while on your desktop)
  • In the menu choose Control Panel
  • Click Uninstall a program under Programs and Features.
  • Locate programs that can be connected with Down Checker or other related suspicious program.
  • Click Uninstall button.
  • Wait until uninstall process is complete.

Windows 7/Vista

  • Click Start and choose Control Panel.
  • Choose Programs and Features and Uninstall a program.
  • In the list of installed programs find entries related to Down Checker
  • Click Uninstall button.

Windows XP

  • Click Start
  • In the menu choose Control Panel
  • Choose Add / Remove Programs.
  • Find Down Checker related entries.
  • Click Remove button.

Remove Down Checker related extensions from your browsers

Down Checker in some cases can be accompanied with browsers extension. We recommend you to use free option Toolbar Remover under Tools in Stronghold AntiMalware to remove unwanted browser extensions related to Down Checker. We recommend you to perform scan your PC with Removal Tool or Stronghold AntiMalware. To remove extenions from your browsers manually do the following:

Internet Explorer

  • While in Internet Explorer click cogwheel icon in the top right corner
  • In the menu choose the Manage Add-ons
  • Select Toolbar and Extension tab.
  • Choose add-on possibly related to Down Checker or other related adware BHO.
  • Click Disable button.

Warning: This option will only disable unwanted plugin. For effective Down Checker removal use WiperSoft Antispyware Malware Remediation Tool.

Google Chrome

  • Start Google Chrome.
  • In the address bar type chrome://extensions/
  • In the list of add-ons find related to Down Checker and click recycle bin icon.
  • Confirm Down Checker removal.

Mozilla Firefox

  • Open Firefox
  • In the address bar type about:addons
  • Click Extensions tab.
  • In the list of extension locate ones related to Down Checker.
  • Click Remove button near it.

Protect computer and browsers from infection

Adware threats like Down Checker are very widespread and, unfortunately, many anti-virus programs fail to detect it. To protect your computer from future infection we recommend you to use WiperSoft Antispyware Malware Remediation Tool, it has active protection module and browser settings guard. It does not conflict with any anti-virus programs and creates additional shield against threats like Down Checker.


Home | Partners | Shop | Support | Terms of use | Contact Us | Privacy Policy | Sitemap

Copyright © 2019 Security Stronghold. All Rights Reserved. All content on this website is protected and belongs to Security Stronghold LLC.