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Danger level 7
Type: Adware
Common infection symptoms:
  • Annoying Pop-up's
  • Normal system programs crash immediatelly
  • Shows commercial adverts


Trezaa is an advertising-supported program that can show ads on Chrome, Firefox, and IE browsers. If two or all three of these browsers are installed on your computer, you might find all of them affected at the same time. According to the official information provided to users via trezaa.com, this adware can help you evade typos and other errors when entering site addresses; however, it is unlikely that this is the main service that computer users are attracted by. Users are also promised to receive beneficial savings deals, coupons, and “bargains” while browsing the web. On top of that, the so-called “Price Compare widget” is introduced to them as well. The problem is that this program will not help you compare prices or avoid URL errors because it was created only to show third-party ads, and this is why we suggest removing Trezaa.

The advertisements shown by this adware have a tag, "Ads by Trezaa," which makes them easy to identify. According to our research, the ads are injected using the Trezaa.Service.exe process that can be found in the main folder with the rest of the files, including Microsoft.Win32.TaskScheduler.dll and Ionic.Zip.dll. If you want to eliminate the suspicious adware, these are the files that you need to delete from your computer. We will discuss the removal in depth a little later. Right now, we need to discuss why it is important to eliminate this advertising-supported program from your PC. Unfortunately, not all users realize that this program is unreliable because it continuously displays ads when you visit shopping sites (e.g., ebay.com or walmart.com). These ads might be selected according to your browsing history so that you would be more likely to click on them. Are you surprised that adware can record your browsing history and collect information about you?

Cookies are usually employed for the collection of data, and this is the case with Trezaa as well. The Privacy Policy of this program is not represented on its official websites, but you can access it via navigationguide.net/Trezaa/tvPrivacy.html. Users are redirected to this page after clicking the question mark icon on the ads shown. If you access this site after downloading the program, you might be provided with the “Opt out” tool. This tool is associated with the advertising service of this adware. If you choose to opt out, a notification will appear suggesting that these services will be terminated within 4-6 hours; however, it is unlikely that this tool works. Even if it works, we still advise eliminating this adware from your operating system. As long as this program is present on your operating system, your virtual security will be vulnerable as every ad shown might hide a link to an unreliable website.

Our researchers have observed that Trezaa comes in bundles, and that is a reason to be concerned. If this adware comes bundled with potentially unwanted programs, you might be able to erase them manually without facing any security problems. However, if your operating system gets infected with dangerous infections, you might be in trouble. We know that Trezaa can spy on you and inject ads, but it cannot steal your identity, take over banking accounts, or use your name to scam others, and there are malicious threats that are capable of such activity. Note that some threats are easier to find than others, and it is wise to employ the help of a malware scanner to identify malicious infections. SpyHunter offers a free scanner that will quickly inspect your operating system and inform you about existing threats.

You should not look at the removal process as a scary or complicated task. Sure, at first, the steps below might be intimidating, but, if you follow our directions carefully, you will delete Trezaa in no time. You can eliminate this program from your operating system by uninstalling it as well; however, if you choose this method, you will have to eliminate several leftovers. As mentioned previously, third-party malware could be active on your operating system, and we are very concerned about this. Malicious programs can hide and use the names of authentic files to hide themselves from you. What is more, malicious threats might have convincing disguises. If you are not experienced – and most users are not – quickly install a malware remover to clean your operating system from all dangerous threats.

Trezaa Removal

  1. Simultaneously tap keys Win+E to access Explorer.
  2. Type %ALLUSERSPROFILE% into the address bar and tap Enter.
  3. Right-click the folder called “Trezaa” and choose Delete.
  4. Type %PROGRAMFILES% (or %PROGRAMFILES(x86)%) into the address bar and tap Enter.
  5. Repeat step 3 to eliminate the unwanted folder.
  6. Type %WINDIR%\System32\Tasks\ (or %WINDIR%\Tasks if you use Windows XP) and tap Enter.
  7. Delete Trezaa Scheduler.
  8. Simultaneously tap Win+R keys to access RUN.
  9. Type regedit.exe and click OK to access the Registry Editor.
  10. In the pane on the left navigate to HKLM\SOFTWARE\Classes\Installer\Assemblies.
  11. Right-click and Delete these keys:
    • C:|Program Files (x86)|Trezaa|Ionic.Zip.DLL
    • C:|Program Files (x86)|Trezaa|Microsoft.Win32.TaskScheduler.DLL
    • C:|Program Files (x86)|Trezaa|Trezaa.Library.DLL
    • C:|Program Files (x86)|Trezaa|Trezaa.ProxyServer.DLL
    • C:|Program Files (x86)|Trezaa|Trezaa.Scheduler.exe
    • C:|Program Files (x86)|Trezaa|Trezaa.Service.exe
    • C:|Program Files (x86)|Trezaa|Trezaa.Updater.exe
  12. Right-click and Delete all Trezaa (look at the name) related keys in these paths:
    • HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\
    • HKLM\SOFTWARE\Wow6432Node\
    • HKLM\SOFTWARE\Wow6432Node\Microsoft\Tracing\
    • HKLM\SYSTEM\ControlSet001\services\
    • HKLM\SYSTEM\CurrentControlSet\services\
  13. Navigate to HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\.
  14. Right-click and Delete the key called “{429B6B35-320D-41F2-AA7E-6B10D36055A1}.”
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