How to remove the TidyNetwork malware

Some anti-malware programs classify petn.dll as a harmful extension to Internet Explorer: for example Generic PUA LL (detected by Sophos), and Adware.Generic.1018172 (detected by F-Secure). Add-ons like this can display ads, slow down your computer and cause various other errors. If you can't remember installing the associated TidyNetwork software, it's no surprise. In most cases, this kind of adware is installed on the side when you install a freeware product like a Youtube Downloader or a PDF Converter. In the following selection, you can read more about TidyNetwork and how to get rid of it.

Click here to automatically remove the TidyNetwork malware

Petn.dll file information

The process known as TidyNetwork or HelperApps appears to belong to software TidyNetwork by TidyNetwork (version 2).

Description: Petn.dll is not essential for Windows and will often cause problems. Petn.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 118,784 bytes (38% of all occurrences), 106,496 bytes, 105,472 bytes or 125,688 bytes. 
This .dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware. IDs used by this BHO include D2E74A82-E3DB-4800-A1D0-90E0B846DC00 or B283D601-8796-4628-9F9A-F5E46A8BC096 or 55 more variants. The program has no file description. The program is not visible. Petn.dll is able to monitor web browsers. There is no detailed description of this service. The file is not a Windows core file. Therefore the technical security rating is 81% dangerous, however you should also read the user reviews.

Recommended: Identify petn.dll related errors

If petn.dll is located in a subfolder of the user's profile folder, the security rating is 82% dangerous. The file size is 106,496 bytes (83% of all occurrences) or 101,376 bytes. It is a file with no information about its developer. The program is not visible. Petn.dll is able to monitor web browsers. There is no detailed description of this service. The petn.dll file is not a Windows system file.

Uninstalling this variant: In case of problems with petn.dll, you can also uninstall TidyNetwork from your computer using the Control Panel applet Uninstall a Program.

Important: Some malware also uses the file name petn.dll, for example Generic PUA LL (detected by Sophos), and Adware.Generic.1018172 (detected by F-Secure). Therefore, you should check the petn.dll process on your PC to see if it is a threat. If TidyNetwork has changed your browser's search engine and start page, you can recover your browser's default settings as follows:

Reset default browser settings for Internet-Explorer ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too [1]. Make cleaning up your browser and your computer simpler and safer with Security Task Manager.


User Comments

this file is dangerous to the system in windows 7. it will stop anti=virus anda infect system files. if you do not have the latest anti=virus windows will freeze keep you restarting until you delete file

Summary: Average user rating of petn.dll: based on 1 vote with 1 user comment. One user thinks petn.dll is dangerous and recommends removing it.

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Best practices for resolving petn issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active petn process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the petn.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

petn.dll [all]