Trojan:win32/tiggre!plock: what it is and how to remove it
Trojan:win32/tiggre!plock is a silent Windows trojan that negatively affects system performance and security. No particular symptoms identify this infection, making detection through antivirus tools essential.
Facts checked October 5, 2026. Removal steps tested on Windows 11 (26H2) and checked against Microsoft's and the browser makers' current documentation. Sections marked as our earlier report are the original text: they describe the threat as it was then and have not been reviewed since. The 2026 status, the removal steps and the questions are current.
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Trojan:win32/tiggre!plock: summary
| Distribution | The threat mainly distributes around with the help of malicious files, malware-laden sites, and other threats. It is possible to get a trojan infection from an infected email attachment or pirated software package |
|---|---|
| Damage | The threat can lead to serious system issues when the machine is affected by the virus and it manages to change settings or add particular files, or infect the machine further |
| Name | Trojan:win32/tiggre!plock |
| Type | Trojan/ Malware |
| Issues | The threat can be set to steal passwords, gather data, steal files, or install other files, programs, and malware. The particular goal of creators can be related to malicious activities, so the existence of this malware damages the system significantly |
| Detection names | No Microsoft detection name is known |
| Removal | Scan the PC with security software to find and remove the malware and anything installed with it. Fortect scans Windows for malware and repairs the system files and settings it damaged. Remove it nowTo use the full-featured product, you have to purchase a license for Fortect. The scan is free. |
Show 4 more facts
| Symptoms | An unknown program in Installed apps |
|---|---|
| Evidence | 4 write-ups by security sites; details still limited |
| First seen | 18 September 2020 |
| Facts checked | 5 October 2026 |
What Trojan:win32/tiggre!plock does on an infected PC
From our report of Sep 2020 · not reviewed since
Trojan:win32/tiggre!plock is the virus that can negatively affect the performance and state of the security
Trojan:win32/tiggre!plock is the trojan detection result that shows up on the screen once the infection is detected.
Unfortunately, there are no particular indications or symptoms that could indicate this infection, so people keep complaining and asking questions about the particular heuristic name and the intruder associated with it. There are many things that malicious actors can run the malware for, so your device can get damaged significantly when the malware is present.
Sometimes a particular number of samples can show that the threat is widely spread and can be more dangerous than any other typical trojans or malware infections. It is hard to determine the particular threat and the name is also not identifying anything.
However, Trojan:win32/tiggre!plock virus is the Windows operating system specific threat that should be investigated when anti-malware tool reports the possible danger. It can be an indicator of a damaging infection that distributes other threats or even directly installs ransomware. It is common for malware of such type to be the vector for threats like money-demanding malware.
Trojan:win32/tiggre!plock is the threat that infiltrates the system silently and triggers issues with the system when all the processes and programs that this virus installs triggers damage to system functions and security. This malware can be set to perform many different functions because it is silent and can be extremely intrusive, dangerous.
Trojan:win32/tiggre!plock may act as:
You should remove the threat as soon as possible. Especially when the virus is detected and anti-malware tools determined that Trojan:win32/tiggre!plock removal is needed. You can trust the AV engine and quarantine the virus, delete it from the machine directly. Trojans can be persistent, so you might reboot the machine in Safe Mode before you launch any of the anti-malware tools.
Unfortunately, you cannot remove Trojan:win32/tiggre!plock easily by running through the programs or files on the machine. There are many issues that this infection creates, so you should get a proper anti-malware tool and launch the proper check on the system. Try or for this step though there are many different databases that AV tools use, so detection and success of the termination depend on that.
Trojan:win32/tiggre!plock also can trigger the execution of other programs and files, so your machine gets further affected when you allow the intruder to run for a while. Make sure to avoid those infections or remote access attacks by eliminating the virus yourself. Experts note about the danger level of these threats.
Commands, processes, and other threats can affect the system and interfere with the persistence of the virus. Also, changes in the system folders, functions, and programs make the infection last for a while undetected. Run a check using or a similar tool, so you can clear any Trojan:win32/tiggre!plock damage.
- password stealer;
- data stealer;
- credential stealer;
- malware injecter;
- banking malware;
- vector for the remote access.
From our report of Sep 2020 · not reviewed since
More from our earlier report on Trojan:win32/tiggre!plock
- Trojan:win32/tiggre!plock removal should be performed using anti-malware tools or security programs, so the system is fully cleared.
- Rely on or for the procedure
- The system can be repaired and cleared from any of the virus damage if you rely on proper system tools like optimizers or repair applications like
How Trojan:win32/tiggre!plock got on your PC
From our report of Sep 2020 · not reviewed since
Fake error messages can wrongfully report issues with your machine or applications, gadgets, operating systems, so you fall for the error and think that the update or installation is needed.
However, these downloads mainly lead to issues with malicious files, so the download is not related to problems on the computer.
This issue with malicious files can also trigger issues when you receive spam emails. Those notifications contain malicious attachments in the form of MS documents or JavaScript files. Once such a file gets opened, the payload of the malicious program is dropped and activated. The process is not noticed by the user, so infiltration happens silently.
How to remove Trojan:win32/tiggre!plock
A loader's job is to install other malware, so treat the PC as infected with more than one program until the scans are clean.
Step 1: Delete scheduled tasks that bring it back
Open Task Scheduler from the Start menu and click Task Scheduler Library. Select each task you do not recognise and read the Actions tab:
- a task that starts a file in
%AppData%or%Temp% - runs
powershellwith a long encoded line - opens a web address belongs to Trojan:win32/tiggre!plock or a similar program
Right-click such a task and choose Delete, and check the subfolders too. Leave tasks from Microsoft, your PC's maker and programs you use. Task Scheduler is the same in Windows 11 and Windows 10.
Windows 11: Task Scheduler Library, the task selected, the Actions tab shows the file it runs. Full procedure with screenshots: Remove what malware leaves behind in Windows
- a task that starts a file in
Step 2: Remove it from startup
Whatever Trojan:win32/tiggre!plock installed usually starts with Windows. Open Task Manager with Ctrl + Shift + Esc, go to Startup apps in Windows 11 or the Startup tab in Windows 10, and disable what you do not know, starting with entries that have an empty Publisher column.
Open file location on the right-click menu shows the file, which helps you decide and tells you what to delete later. Disabling is safe: if something you need stops working, switch it back on.
Full procedure with screenshots: Stop apps from opening at startup On uGetFix
Step 3: Delete the folders left behind
What the uninstaller leaves behind is usually in the user folders. Open File Explorer, switch on View > Show > Hidden items (in Windows 10 View > Hidden items), and go through
%LocalAppData%,%AppData%, %ProgramData% and the two Program Files folders.Sort by Date modified and delete folders that appeared together with the problem and belong to no program you use. Folders with random names that hold
.exe,.dll, .js or .ps1 files are the strongest sign.Full procedure with screenshots: Remove what malware leaves behind in Windows
Step 4: Scan the PC, then run the offline scan
Open Windows Security > Virus & threat protection > Scan options, run a Full scan and remove everything it finds. Then select Microsoft Defender Antivirus (offline scan) and click Scan now: the PC restarts and scans before Windows loads, which finds files that hide while Windows runs.
Save your work first, because the offline scan takes about 15 minutes. Both scans are built into Windows 11 and Windows 10, and a second scanner from another vendor is a useful extra opinion.
Windows 11: Windows Security > Virus & threat protection > Scan options. Full procedure with screenshots: Run a Microsoft Defender Offline scan
Step 5: Change passwords from another device and sign out other sessions
Assume that the passwords saved in this PC's browsers, and the accounts that were open in them, are known to the attacker. From a phone or a clean computer, change the e-mail password first, then banking, shopping, social and gaming accounts.
Use each service's option to sign out of all other sessions, because stolen cookies keep a session open even after a password change. Turn on two-step verification on each account. Wait with the infected Windows 11 or Windows 10 PC until the scans are clean.
Full procedure with screenshots: Turn on two-step verification / secure a hacked account
Instructions for each browser and system
The detailed steps for every browser and system this guide covers. Open the one you use.
Manual removal using Safe Mode
Important! →
Manual removal guide might be too complicated for regular computer users. It requires advanced IT knowledge to be performed correctly (if vital system files are removed or damaged, it might result in full Windows compromise), and it also might take hours to complete. Therefore, we highly advise using the automatic method provided above instead.
Step 1. Access Safe Mode with Networking
Manual malware removal should be best performed in the Safe Mode environment.
Windows 7 / Vista / XP
- Click Start > Shutdown > Restart > OK.
- When your computer becomes active, start pressing F8 button (if that does not work, try F2, F12, Del, etc. - it all depends on your motherboard model) multiple times until you see the Advanced Boot Options window.
- Select Safe Mode with Networking from the list.
Windows 10 / Windows 8
- Right-click on Start button and select Settings.
- Scroll down to pick Update & Security.
- On the left side of the window, pick Recovery.
- Now scroll down to find Advanced Startup section.
- Click Restart now.
- Select Troubleshoot.
- Go to Advanced options.
- Select Startup Settings.
- Press Restart.
- Now press 5 or click 5) Enable Safe Mode with Networking.
Step 2. Shut down suspicious processes
Windows Task Manager is a useful tool that shows all the processes running in the background. If malware is running a process, you need to shut it down:
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Click on More details.
- Scroll down to Background processes section, and look for anything suspicious.
- Right-click and select Open file location.
- Go back to the process, right-click and pick End Task.
- Delete the contents of the malicious folder.
Step 3. Check program Startup
- Press Ctrl + Shift + Esc on your keyboard to open Windows Task Manager.
- Go to Startup tab.
- Right-click on the suspicious program and pick Disable.
Step 4. Delete virus files
Malware-related files can be found in various places within your computer. Here are instructions that could help you find them:
- Type in Disk Cleanup in Windows search and press Enter.
- Select the drive you want to clean (C: is your main drive by default and is likely to be the one that has malicious files in).
- Scroll through the Files to delete list and select the following:
Temporary Internet Files
Downloads
Recycle Bin
Temporary files - Pick Clean up system files.
- You can also look for other malicious files hidden in the following folders (type these entries in Windows Search and press Enter):
%AppData%
%LocalAppData%
%ProgramData%
%WinDir%
After you are finished, reboot the PC in normal mode.
From our report of Sep 2020 · not reviewed since
Clear the machine form traces of any malware and eliminate Trojan:win32/tiggre!plock trojan
You cannot know how long this Trojan:win32/tiggre!plock virus has been active on the machine, so you need to run the proper anti-malware tool and clean the system fully, so these infections cannot lead to anything more damaging or dangerous. Rely on the professional application to get better results.
To remove Trojan:win32/tiggre!plock with all the associated programs and files, intruders, you need to run or , so the software designed to fight malware can find the infection files and terminate the trojan fully. Then you need to double-check and ensure that the machine virus-free.
When you completed Trojan:win32/tiggre!plock removal, you should also clear the damage of this threat and try to alter files and functions that malware triggered while running in the background. The proper system optimization tool like or a repair application can help with affected files and OS features.
[GI=method-1]Reboot the system in the Safe Mode with Networking, so the AV tool can run properly and find Trojan:win32/tiggre!plock malware
[GI=method-2]System Restore can help you with malware termination
After removal: passwords, accounts and prevention
Secure your accounts after the clean-up
Assume that whatever was saved in the browsers on this PC while the PC showed trojan:win32/tiggre!plock in the list of installed apps has been copied:
- passwords
- cookies
- autofill data
Work from a clean device, or from this PC once the offline scan finds nothing.
Start with your main e-mail account, because it can reset everything else, then banking and payment, then social and gaming accounts. Change each password, sign out of all sessions and turn on two-step verification: Turn on two-step verification / secure a hacked account.
The full order, including crypto wallets and card replacement, is in securing your accounts after malware.
Stream videos without limitations, no matter where you are
There are multiple parties that could find out almost anything about you by checking your online activity.
While this is highly unlikely, advertisers and tech companies are constantly tracking you online. The first step to privacy should be a secure browser that focuses on tracker reduction to a minimum.
Even if you employ a secure browser, you will not be able to access websites that are restricted due to local government laws or other reasons. In other words, you may not be able to stream Disney+ or US-based Netflix in some countries. To bypass these restrictions, you can employ a powerful VPN, which provides dedicated servers for torrenting and streaming, not slowing you down in the process.
Data backups are important - recover your lost files
Ransomware is one of the biggest threats to personal data.
Once it is executed on a machine, it launches a sophisticated encryption algorithm that locks all your files, although it does not destroy them. The most common misconception is that anti-malware software can return files to their previous states. This is not true, however, and data remains locked after the malicious payload is deleted.
While regular data backups are the only secure method to recover your files after a ransomware attack, tools such as can also be effective and restore at least some of your lost data.
Questions about Trojan:win32/tiggre!plock
What is Trojan:win32/tiggre!plock?
It is a Windows-specific trojan detection result that indicates a potentially dangerous infection. There are no particular symptoms that could specifically identify this threat, making it particularly difficult to diagnose without antivirus tools.
However, this malware can negatively affect system performance and security significantly. The threat is commonly used to distribute other threats or directly install ransomware. Malicious actors may set it to steal passwords, gather data, steal files, or install additional malware depending on their goals.
How dangerous is Tiggre!plock malware?
It is highly dangerous. This trojan infiltrates systems silently and triggers serious issues when activated processes and programs cause damage to system functions and security. The malware can be extremely intrusive and perform many different functions due to its silent nature.
It may serve as a vector for remote access, allowing attackers to control your computer. Experts note that the danger level of these threats is significant and warrants immediate removal.
What damage can this trojan cause?
The infection causes system performance degradation and can render systems unstable. It may execute other programs and files, leading to further system compromise when left running. Changes to system folders, functions, and programs allow the infection to persist undetected.
The trojan can create system issues that make diagnosing the root cause extremely difficult. Persistent malicious commands and processes affect system stability and may compromise security entirely.
How does tiggre!plock infect computers?
The malware primarily distributes through malicious files, malware-laden sites, and other threats. Infected email attachments and pirated software packages commonly carry this trojan. Fake error messages claiming system problems can falsely persuade users to download malicious updates.
Spam emails with malicious attachments in forms of documents or JavaScript files deliver the infection silently. Once opened, the payload is dropped and activated without user awareness.
How do I remove Trojan:win32/tiggre!plock?
Use professional anti-malware tools or security software to perform a complete system scan. Reboot into Safe Mode with Networking before launching the antivirus for better results without malware interference.
After detection, allow the security software to quarantine and delete the infection. Run system repair tools to clear any damage the trojan caused. Double-check with another scan to ensure complete removal and verify the system is virus-free.
What about system damage from tiggre!plock?
The malware causes file alterations and registry modifications that persist after infection removal. After eliminating the trojan, run system optimization or repair tools to identify and fix affected files and OS features.
These tools can address corrupted registry entries and damaged system functions. However, complete restoration may be difficult depending on the extent of modifications the malware made. Professional assistance may be necessary for severely corrupted systems.
Should I use Safe Mode for removal?
Yes, absolutely. Rebooting into Safe Mode with Networking before running anti-malware tools is highly recommended. Safe Mode prevents the trojan from running and interfering with the removal process.
The antivirus tool can access files and processes more effectively without malware interference. This approach significantly increases the chances of complete removal and prevents the trojan from protecting or hiding itself.
How can I prevent tiggre!plock infection?
Avoid clicking on unknown links and pop-up ads, especially those claiming system problems or offering updates. Download software only from official and verified sources. Do not open suspicious email attachments or enable macros in documents from unknown senders.
Keep your operating system patched with the latest security updates. Maintain updated security software and run regular scans to catch infections before they cause extensive damage.
Will Fortect remove Trojan:win32/tiggre!plock?
Fortect scans Windows for malware and unwanted programs and repairs the system files and settings they change, and its free scan shows what it finds on your PC before you decide anything.
For Trojan:win32/tiggre!plock, follow the plan above as well: the browser steps take back permissions and settings that no scanner treats as a threat, and uninstalling the program that brought it removes the source.
Run Microsoft Defender's full scan and, if anything was found, its offline scan as a second opinion. If the symptoms are gone after the plan and both scans are clean, there is nothing more to do.
Sources
- Reddit: What does "Trojan:Win32/Tiggre!plock" *exactly* do? (read October 5, 2026)
- Wikipedia: Ransomware (read October 5, 2026)
- Virusai: Virusai (read October 5, 2026)
- FTC: How to recognize, remove and avoid malware (read October 5, 2026)
- Microsoft Learn: Microsoft Defender Offline (read October 5, 2026)