Trojan.Multi.GenAutorunReg.a: what it is and how to remove it
Trojan.Multi.GenAutorunReg.a is a variant of a trojan horse that aims to access sensitive information and control processes running on the machine. It might also be set to steal that data or control other functions of the system.
Facts checked October 7, 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.Multi.GenAutorunReg.a: summary
| Distribution | Malicious macros[1] and other threats can spread trojans quickly |
|---|---|
| Name | Trojan.Multi.GenAutorunReg.a |
| Type | Trojan/ malware |
| Issues | Threat runs in the background and cannot be easily spotted or removed. Meanwhile, trojan can steal data, damage the machine, and infiltrate other malware on the PC. It might be designed to spread ransomware and do nothing else |
| Detection names | No Microsoft detection name is known |
| Damage | Not recorded in the old report |
| 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 | 13 November 2020 |
| Facts checked | 7 October 2026 |
What Trojan.Multi.GenAutorunReg.a does on an infected PC
From our report of Nov 2020 · not reviewed since
Paying attention to details is key in avoiding threats
The trojan attack happens in different ways.
One of them is by opening an infected email attachment from the shady sender. In most cases, spam messages that have the malware payload in their attachments contain more files in the email. Various common subject lines try to lure users into opening the infected one.
The legitimate files may be of the following extensions:
- doc
- doc
- jpeg
Instead of safe files, there may be an infected file containing the malicious payload of the malware. You should be cautious in what emails you open online and always use spam filters that block out emails. Keeping AV tools can also help to block malware from possible infections.
From our report of Nov 2020 · not reviewed since
Clean the system fully from Trojan.Multi.GenAutorunReg.a virus traces
There are many files and programs that can be related to Trojan.Multi.GenAutorunReg.a, so you should remove them all to terminate the malware properly.
You cannot achieve that manually because trojan has no particular files and apps that could be uninstalled.
Trojan.Multi.GenAutorunReg.a removal process should start with anti-malware tools, so you can find and eliminate all pieces. or tools can help you with a proper system check and termination of various types of malware.
When you remove Trojan.Multi.GenAutorunReg.a using anti-malware tools, your device should immediately work better than before. However, you might need to repair registry entries, other issues. For that - run .
[GI=method-1]You can try to reboot the machine in Safe Mode and then remove the Trojan.Multi.GenAutorunReg.a properly
From our report of Nov 2020 · not reviewed since
More from our earlier report on Trojan.Multi.GenAutorunReg.a
- You need to remove Trojan.Multi.GenAutorunReg.a as soon as possible, so you should rely on anti-malware tools for that
- Make sure to repair the OS and other files, programs with
How Trojan.Multi.GenAutorunReg.a got on your PC
From our report of Nov 2020 · not reviewed since
Trojan.Multi.GenAutorunReg.a is a variant of a trojan horse that aims to access sensitive information and control processes running on the machine.
It might also be set to steal that data or control other functions of the system. It is a virus that researchers report to stop mainly in devices used in regions like Russia, Vietnam, and India the most.
It doesn't mean that you cannot get this virus or any other GenAutorunReg - type of malware in other places in the world. The main issue with this virus is the stealthy infiltration ad possible damage that can be done to the machine while the infection silently runs in the background.
Trojan.Multi.GenAutorunReg.a is a dangerous threat and might be difficult to remove and even spot on the infected computer. It uses specific software and techniques to conceal itself from the user and security tools, antivirus applications. This is the reason why the threat is one of the more damaging malware, and many experts recommend relying on powerful AV tools.
One of the best ways to remove Trojan.Multi.GenAutorunReg.a is by running a scan with or . These tools can provide a proper system check and indicate all the threats, files, programs that affect your machine without your knowledge.
Trojan.Multi.GenAutorunReg.a is a detection name that can be shown on the list of AV engine scans, but you shouldn't focus on particular names or heuristic results because the sam malware can get detected by different tools with a specific or a general name.
It depends strongly on the database of the specific anti-malware program. You might get this alter with a trojan name out of nowhere, if so - remove it ASAP.
Trojan.Multi.GenAutorunReg.A might replace required files to run actively it may also open a connection to a remote host, so there are many risks of getting hacked or receive another malware this way. Once the access to your device is opened for another actor, the trojan may begin to use the following tools:
Trojan.Multi.GenAutorunReg.a removal is crucial for the security of the machine, but remember to recover the operating system, altered or corrupted files. For that, you need tools that can find and fix such issues for you. So can be one of them. You can also find a few tips below for the proper trojan termination.
- Keyloggers;
- Downloaders;
- Tools to monitor the infected PC's screen and take screenshots;
- Tools for controlling the hardware of the computer – CPU, graphics driver, CD/DVD, USB drives;
- File explorer tools.
How to remove Trojan.Multi.GenAutorunReg.a
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
Programs like Trojan.Multi.GenAutorunReg.a add a scheduled task so they return after an uninstall or reopen a page at every sign-in. Start Task Scheduler, open Task Scheduler Library and sort by Last Run Time to see what ran recently.
On the Actions tab, a program in a user folder, a script or a web address is a warning sign; right-click such a task and choose Delete.
Tasks with names copying Google, Edge or Windows updaters but pointing to an odd folder are typical. The tool looks 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
Step 2: Remove it from startup
Press Ctrl + Shift + Esc to open Task Manager and select Startup apps (Windows 11) or the Startup tab (Windows 10). Disable entries you do not recognise, especially ones with no publisher or with a name that copies a Windows component.
Right-click an entry and choose Open file location to see where it runs from: programs in
%AppData%or%Temp%deserve a closer look. Some entries are not listed there but in the registry Run keys, which the procedure below shows how to check.Full procedure with screenshots: Stop apps from opening at startup On uGetFix
Step 3: Delete the folders left behind
Uninstalling often leaves the program's folders, and some threats reinstall themselves from them.
Press Windows + R, type
%LocalAppData%and press Enter, then do the same for%AppData%and %ProgramData%, and look for folders named after Trojan.Multi.GenAutorunReg.a, its publisher or created on the day the problem started. Delete those folders, and check C:\Program Files and C:\Program Files (x86) too.If Windows says a file is in use, end it in Task Manager or delete the folder after a restart in Safe Mode. The folders are the same in Windows 11 and Windows 10.
Full procedure with screenshots: Remove what malware leaves behind in Windows
Step 4: Scan the PC, then run the offline scan
A scan finds the parts of Trojan.Multi.GenAutorunReg.a that the manual steps cannot see. In Windows Security > Virus & threat protection > Scan options, start a Full scan and quarantine what it reports.
Follow it with Microsoft Defender Antivirus (offline scan) > Scan now, which restarts the PC and checks the disk while Windows and the malware are not running.
It takes about 15 minutes and works the same in Windows 11 and Windows 10. If either scan finds something, run the full scan again after removal until it comes back clean.
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
Trojan.Multi.GenAutorunReg.a can copy saved passwords, cookies and session tokens and send them out in seconds, so cleaning the PC does not undo the theft.
Change your passwords on a device that was never infected, starting with the e-mail account, since every other reset goes through it. On each account, end all other sessions and check the recovery e-mail, phone number and forwarding rules.
Then turn on two-step verification. Sign in on the Windows 11 or Windows 10 PC again only after the offline scan is 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.
After removal: passwords, accounts and prevention
Accounts come next
Because the PC showed trojan.Multi.GenAutorunReg.a in the list of installed apps, a sign of a program that could read browser data, the clean-up is only half of the work.
The other half happens in your online accounts.
Change passwords from a clean device, beginning with e-mail; sign out of all sessions; check forwarding rules and recovery phone numbers; and turn on two-step verification with an authenticator app or a passkey. Ask your bank to replace cards saved in the browser.
Why the order matters and what to check in each account: secure your accounts after malware.
Access your website securely from any location
When you work on the domain, site, blog, or different project that requires constant management, content creation, or coding, you may need to connect to the server and content management service more often. The best solution for creating a tighter network could be a dedicated/fixed IP address.
If you make your IP address static and set to your device, you can connect to the CMS from any location and do not create any additional issues for the server or network manager that needs to monitor connections and activities. VPN software providers like can help you with such settings and offer the option to control the online reputation and manage projects easily from any part of the world.
Recover files after data-affecting malware attacks
While much of the data can be accidentally deleted due to various reasons, malware is one of the main culprits that can cause loss of pictures, documents, videos, and other important files.
More serious malware infections lead to significant data loss when your documents, system files, and images get encrypted. In particular, ransomware is is a type of malware that focuses on such functions, so your files become useless without an ability to access them.
Even though there is little to no possibility to recover after file-locking threats, some applications have features for data recovery in the system. In some cases, can also help to recover at least some portion of your data after data-locking virus infection or general cyber infection.
Questions about Trojan.Multi.GenAutorunReg.a
What is Trojan.Multi.GenAutorunReg.a and why is it on my PC?
Trojan.Multi.GenAutorunReg.a is a program that was installed on the PC, most likely together with something else you downloaded. Free software sites and many installers add extra programs on setup pages with pre-ticked boxes, so the extra install looks like your choice even though nobody read the page.
Check the install date in Settings, Apps, Installed apps: the program you installed that day is the probable carrier. If you do not need Trojan.Multi.GenAutorunReg.a, uninstall it. If it belongs to your hardware or to a program you use, search its exact name and publisher first, because drivers and their tools can have unfamiliar names.
Trojan.Multi.GenAutorunReg.a will not uninstall. What can I do?
First restart the PC and try again, because the program may have been running and locked its own files. If the uninstaller is missing or fails, start Windows in Safe Mode, where most third-party programs do not start, and remove Trojan.Multi.GenAutorunReg.a from Installed apps there.
If it still refuses, delete its startup entry and its scheduled task, restart, and try once more. A program that actively prevents removal is behaving like malware, so finish with a Microsoft Defender offline scan. Avoid third-party uninstallers offered on search ads; several of them are unwanted programs themselves.
How do I know if my PC has Trojan.Multi.GenAutorunReg.a?
Often you do not, which is the point of a trojan. Possible signs are an antivirus alert naming Trojan.Multi.GenAutorunReg.a or a generic trojan detection, unknown programs or scheduled tasks, processes with random names in Task Manager, browser extensions you did not add, security settings turned off, slower performance, or account alerts about logins from unknown places.
The reliable check is a full scan followed by Microsoft Defender's offline scan. If you recently ran a crack, a fake installer or a command a website told you to paste, scan even without symptoms.
Should I report Trojan.Multi.GenAutorunReg.a?
Report it if you lost money, if accounts were taken over, if you are a business, or if the trojan came through a scam call. A police or national cybercrime report gives you a reference number for your bank and insurer and helps link cases.
You do not need to report a trojan that antivirus blocked before it ran. Before reporting, write down the dates, the detection name, file names and any messages or transactions linked to the attack; screenshots of antivirus alerts are useful evidence. The country list is in the report section above.
Is Trojan.Multi.GenAutorunReg.a a known trojan?
Not as a documented family, at least not yet. What is known is the visible sign, trojan.Multi.GenAutorunReg.a in the list of installed apps, which matches a hidden program working for someone else.
New threats are often seen by victims weeks before researchers publish anything about them. Treat Trojan.Multi.GenAutorunReg.a as you would any trojan:
- remove what starts it
- run an offline scan
- change passwords from another device
If a scan reports a detection name, keep it; it usually reveals the family and whether it is known to download other malware. We update this guide when an analysis appears.
Do I need to reinstall Windows to get rid of Trojan.Multi.GenAutorunReg.a?
Usually not. A thorough clean-up is enough when the offline scan finds nothing afterwards and you do not see trojan.Multi.GenAutorunReg.a in the list of installed apps again. A reset is the safer choice if an attacker had remote control, if security tools were switched off, or if detections come back after every clean-up.
Windows 11 can reset itself without a USB stick under Settings > System > Recovery > Reset this PC. Copy documents and photos out first and scan the copies. A reset does not change passwords or undo stolen data, so the account steps still apply.
I found AnyDesk or ScreenConnect that I did not install. Is that Trojan.Multi.GenAutorunReg.a?
Not necessarily Trojan.Multi.GenAutorunReg.a, but it is a warning sign. These are legitimate remote support tools, and criminals use them as ready-made backdoors, especially after tech support scams or fake invoice calls.
If you did not install it and no one you trust set it up, uninstall it, change passwords from a clean device and check your bank account. If someone connected to your PC through it, follow the steps for remote access trojans and consider a Windows reset. Installed apps sorted by date shows when it appeared.
How dangerous is Trojan.Multi.GenAutorunReg.a?
Treat it as serious until proven otherwise. The visible sign is trojan.Multi.GenAutorunReg.a in the list of installed apps, and programs that behave this way often have more abilities than they show:
- copying passwords
- downloading other malware
- giving remote access
Its family is not known yet, so nobody can say which of these it uses. The good news is that the response is the same in every case and takes about an hour:
- cut the network
- remove the startup entry
- run an offline scan
- change passwords from a clean device
If someone had remote control, a full reset is safer.
Should I check my other computers too?
Yes, it takes little time and removes doubt. Trojan.Multi.GenAutorunReg.a itself usually stays on one PC, but the download that carried it may have been copied to other computers, shared drives may hold the same installer, and an attacker who had access could have tried saved passwords on other devices.
Run a full scan on every Windows PC in the home or office, check shared folders for the original download, and change Wi-Fi and router passwords if they were stored on the infected machine.
Will Fortect remove Trojan.Multi.GenAutorunReg.a?
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.Multi.GenAutorunReg.a, 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
- Wikipedia: Malicious macros (read October 7, 2026)
- Usunwirusa: Usunwirusa (read October 7, 2026)
- CSOonline: What is a keylogger? How attackers can monitor everything you type (read October 7, 2026)
- FTC: How to recognize, remove and avoid malware (read October 7, 2026)
- Microsoft Learn: Microsoft Defender Offline (read October 7, 2026)