PE.Heur.InvalidSig Virus


PE.Heur.InvalidSig is a computer-infecting program that takes over the attacked system and initiates harmful processes in it. PE.Heur.InvalidSig and other threats like it are known as Trojan Horses and they are the most widespread form of malware encountered on the Interned.


The PE.Heur.InvalidSig virus is known for disguising its file and process as regular system

The reason you’ve come across our site is that you’ve probably been infected with PE.Heur.InvalidSig and are now logically looking for a solution to remove it. Luckily, we have come up with a removal guide, designed to help you get rid of this virus once and for all. Nevertheless, if you are not sure exactly which the malicious files that you need to remove are, you should not delete things from your system without running a scan with a professional removal tool. The reason is, Trojan horses like PE.Heur.InvalidSig are known for disguising their files and processes as regular system or user files and processes in order to trick their victims.

The contamination with Trojans typically happens without visible symptoms and, sadly, the presence of the infection on the system oftentimes only gets detected after the virus has completed its agenda. Trojans normally hack into the computer without one’s knowledge after the user clicks on some random web link or malicious ad or when they download unsafe email attachments and cracked software installers. The variety of purposes for which infections like PE.Heur.InvalidSig and Wupp.exe can be used is also great, making those threats even harder for the ordinary user to remove and avoid.

How can PE.Heur.InvalidSig damage your computer?

Trojans such as PE.Heur.InvalidSig not only can sneak inside your system unexpectedly and without any indication, but can also perform many malicious actions. Here is just a short list of some of the Trojans’ most popular uses: 

  • Theft. A Trojan can be designed to access banking and account passwords as well as any other data stored on your device. Then, the developers of this Trojan can use this data for a number of malicious purposes including money theft, hacking of social media accounts, and blackmailing.
  • Espionage. Sometimes the hackers may set PE.Heur.InvalidSig and other Trojan threats to keep track of all your activities, make screenshots of your screen, and even capture embarrassing videos and audios of you by switching on your device’s webcam and microphone without your knowledge.
  • System destruction. A Trojan such as PE.Heur.InvalidSig may also corrupt your entire OS. It might have been specifically programmed by its developers with the intention to destroy your system and make your computer unusable.
  • Virus distribution. Probably the most serious threat that may come from a Trojan like PE.Heur.InvalidSig seems to be its ability to introduce other viruses inside the infected computer. These could be other Trojans, Spyware, Rootkits, and even Ransomware.

Unfortunately, this article will not have an end if we list all the possible malicious actions which a Trojan Horse can perform. However, even the few things that we have mentioned above are enough to give you an idea of how malicious an infection like PE.Heur.InvalidSig is and why you should remove it right away. So, don’t lose time and scroll down to the removal guide to make use of its instructions.


Name PE.Heur.InvalidSig
Type Trojan
Danger Level High (Trojans are often used as a backdoor for Ransomware)
Symptoms Trojans are hard to detect since they don’t show visible symptoms which can give them away.
Distribution Method Cracked software installers, malicious email attachments, fake ads, illegal websites, torrents, pirated content, low-quality websites.
Detection Tool

Remove PE.Heur.InvalidSig Virus

If you are looking for a way to remove PE.Heur.InvalidSig you can try this:

  1. Click on the Start button in the bottom left corner of your Windows OS.
  2. Go to Control Panel -> Programs and Features -> Uninstall a Program.
  3. Search for PE.Heur.InvalidSig and any other unfamiliar programs.
  4. Uninstall PE.Heur.InvalidSig as well as other suspicious programs.

Note that this might not get rid of PE.Heur.InvalidSig completely. For more detailed removal instructions follow the guide below.

If you have a Windows virus, continue with the guide below.

If you have a Mac virus, please use our How to remove Ads on Mac guide.

If you have an Android virus, please use our Android Malware Removal guide.

If you have an iPhone virus, please use our iPhone Virus Removal guide


Some of the steps will likely require you to exit the page. Bookmark it for later reference.

Reboot in Safe Mode (use this guide if you don’t know how to do it).



Press CTRL + SHIFT + ESC at the same time and go to the Processes Tab. Try to determine which processes are dangerous. 


Right click on each of them and select Open File Location. Then scan the files with our free online virus scanner:

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    After you open their folder, end the processes that are infected, then delete their folders. 

    Note: If you are sure something is part of the infection – delete it, even if the scanner doesn’t flag it. No anti-virus program can detect all infections. 


    Hold together the Start Key and R. Type appwiz.cpl –> OK.


    You are now in the Control Panel. Look for suspicious entries. Uninstall it/them. If you see a screen like this when you click Uninstall, choose NO:



    Type msconfig in the search field and hit enter. A window will pop-up:


    Startup —> Uncheck entries that have “Unknown” as Manufacturer or otherwise look suspicious.

    • Remember this step – if you have reason to believe a bigger threat (like ransomware) is on your PC, check everything here.

    Hold the Start Key and R –  copy + paste the following and click OK:

    notepad %windir%/system32/Drivers/etc/hosts

    A new file will open. If you are hacked, there will be a bunch of other IPs connected to you at the bottom. Look at the image below:

    hosts_opt (1)

    If there are suspicious IPs below “Localhost” – write to us in the comments.


    Type Regedit in the windows search field and press Enter.

    Once inside, press CTRL and F together and type the virus’s Name. Right click and delete any entries you find with a similar name. If they don’t show up this way, go manually to these directories and delete/uninstall them:

    • HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious.
      HKEY_CURRENT_USER—-Software—Microsoft—-Windows—CurrentVersion—Run– Random
      HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random

    If the guide doesn’t help, download the anti-virus program we recommended or try our free online virus scanner. Also, you can always ask us in the comments for help!

    About the author


    Brandon Skies

    Brandon is a researcher and content creator in the fields of cyber-security and virtual privacy. Years of experience enable him to provide readers with important information and adequate solutions for the latest software and malware problems.

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