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Remove Lost Files ransomware (Free Guide) - Removal Instructions

removal by Gabriel E. Hall - - | Type: Ransomware

Lost Files ransomware is a virus that marks files with .Lost_Files_Encrypt marker but changes the data code entirely to corrupt the file

Lost Files ransomwareLost_Files ransomware is a cryptovirus that alters users' files instead of encryption to demand payment. This is the ransomware that sends an email about virus infection that contains files, links. and direct download that then leads to malware infiltration eventually.  “Virus Detection On Your Computer!” claims to be the security notification from Microsoft and indicates a trojan virus infection. Unfortunately, the email also includes a download button with the encouragement to get the security scanner. Once that gets pressed is downloaded that contains Windows Security Scanner.exe. After extraction, the “scanner” gets launched and installs the Lost Files virus on the machine.

This infection then starts with file alteration, during which Lost Files ransomware corrupts files by changing the first line of code and marking them with a typical ransomware feature – file extension. Although this is not file-encrypting malware, data gets .Lost_Files_Encrypt appendixes when they get modified.

Name Lost_Files virus
Type File wiper cryptovirus/ ransomware[1]
File marker .Lost_Files_Encrypt
Ransom amount $500, or can go up depending on the victim
Ransom note A pop-up window with the payment process appears with a message demanding the payment. Also, Ransomware Lost Files Message.txt file gets added on the system 
Amount of the ransom Criminals ask the victim to pay $500 in Bitcoin for their file recovery
Malicious files, Windows Security Scanner.exe, 
Contact email
Distribution This malware is distributed via emails that show up as a security warning from Microsoft with the subject line  “Virus Detection On Your Computer!”, and leads to direct downloading of the file that infects the system with file-wiper malware. Typical ransomware delivery includes malicious-macro infected files attached to emails[2] 
Damage The system gets infected, and performance is affected significantly. Files get corrupted and deleted eventually, so the person loses their data completely. Malware other than ransomware can be installed additionally and steal data or damage the system
Removal To remove Lost Files ransomware completely from the machine, you need an anti-malware tool that can detect the virus. For virus damage elimination, and general cleaning rely on Reimage Reimage Cleaner Intego

Lost Files ransomware virus is developed by criminals, so they are determined to get profit from victims. The code of the malware appears re-used from older variants of wiper-ransomware threats, as Xavier Mertens,[3], who got the malicious email states. This is not a typical, but still cryptovirus because victims get the ransom demand message once those files get corrupted.

The Lost Files ransomware message that gets left in the text file reads the following:

Hi, This is Lost_Files Ransomware, Pay us 500 USD to get our decryption software.
So that you can get your files back. The payment is going to be paid in Bitcoin(BTC).
For more information about this please click the same EXE file you clicked when you
lost all your files. There will be detailed instruction there.

There is no need to pay the criminals since it may lead to permanent loss of files, data. It is meant to make money for the developers, so Lost Files ransomware creators are not focusing on contacting you and restoring those files. You can restore files with your data backups, data recovery software, or features like system restore.

However, all these file recovery attempts should go after Lost Files ransomware removal only. If you receive the message and get files corrupted, the virus may renew itself and affect files added after the initial attack. Be aware of that and try to clean the machine fully, delete al the virus-related files before employing any software.

Lost_Files ransomware virusLost Files ransomware is similar to other crypto-extortion based threats, so sending money is the worst solution since criminals don't care for your belongings.

This malicious infection occurs when the person receives an email with a malicious script that quickly gets triggered by installing the shady tool which supposed to protect the computer. Microsoft is not sending such emails indicating viruses on the system. If you receive anything like that you need to clean the email box and machine, or you will need to remove Lost Files ransomware later on.

Please don't pay the demand for Lost_Files ransomware creators because the file restoring may not even happen. This is how you risk getting more infections on the machine or even permanently loosing your important files. Backups or third-party software are better options.

As for Lost_Files ransomware removal, you need to employ an anti-malware program that can clean all traces of the malware. You should know that such tools as Reimage Reimage Cleaner Intego are not recovering the encrypted data. This is a security program designed to eliminate the malware – a reason why your files get affected.

However, virus damage and corrupted settings get affected too by the malware, so anti-malware tools manage to fix those issues. You can also rely on tips and tricks, data recovery options listed below the Lost_Files ransomware termination guide. 

Malicious processes disguised behind a software company name and security warning

It is known that this particular virus spreads with the help of malicious files, email attachments, and direct downloads of the malware payload. The email that states to inform victims about virus issues gets named Windows Security Scanner that is initially downloaded as a tool needed for protection. Unfortunately, malicious software is executed once the file is installed. The machine gets infected immediately.

This is a common method of malware distribution that belongs to ransomware families because spam emails are one of the main vectors alongside cracked software and other malware like worms or trojans. Malicious macro virus-laced documents are the more common attachments, but experts[4] are aware that cybercriminals use other vectors to disguise the purpose.

Lost Files virusLost Files cryptovirus is a file-locking malware that disguises the distribution of the threat behind the fake Microsoft security email.

Don't consider paying, get anti-malware tool for Lost_Files ransomware elimination instead

You may need to learn a few things before you can remove Lost Files ransomware yourself manually. Even then there is not much possibility to get the system back to a safe and virus-free state. Even advanced and experienced PC users are not capable of finding all the malware files and associated programs, so stay to automatic methods.

Lost Files ransomware virus also alters system settings, disables particular programs, and functions of the computer. You need to get back to normal settings and disable malicious programs if you want to terminate this file-locker completely.

For that reason, we recommend going for an automatic Lost Files ransomware removal using anti-malware tools like Reimage Reimage Cleaner Intego, SpyHunter 5Combo Cleaner, Malwarebytes. Such a threat can disable your AV tool in advanced, so reboot the machine in a safe mode and run the scan then.

do it now!
Reimage Happiness
Intego Happiness
Compatible with Microsoft Windows Supported versions Compatible with OS X Supported versions
What to do if failed?
If you failed to remove virus damage using Reimage Intego, submit a question to our support team and provide as much details as possible.
Reimage Intego has a free limited scanner. Reimage Intego offers more through scan when you purchase its full version. When free scanner detects issues, you can fix them using free manual repairs or you can decide to purchase the full version in order to fix them automatically.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Reimage, try running SpyHunter 5.
Alternative Software
Different software has a different purpose. If you didn’t succeed in fixing corrupted files with Intego, try running Combo Cleaner.

To remove Lost Files virus, follow these steps:

Remove Lost Files using Safe Mode with Networking

Remove Lost Files ransomware with the help of Safe Mode with Networking. This is how you can run the AV without interuptions

  • Step 1: Reboot your computer to Safe Mode with Networking

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Safe Mode with Networking from the list Select 'Safe Mode with Networking'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Networking in Startup Settings window. Select 'Enable Safe Mode with Networking'
  • Step 2: Remove Lost Files

    Log in to your infected account and start the browser. Download Reimage Reimage Cleaner Intego or other legitimate anti-spyware program. Update it before a full system scan and remove malicious files that belong to your ransomware and complete Lost Files removal.

If your ransomware is blocking Safe Mode with Networking, try further method.

Remove Lost Files using System Restore

System Restore is the feature capable of recovering the system in a previous state when the virus was not present

  • Step 1: Reboot your computer to Safe Mode with Command Prompt

    Windows 7 / Vista / XP
    1. Click Start Shutdown Restart OK.
    2. When your computer becomes active, start pressing F8 multiple times until you see the Advanced Boot Options window.
    3. Select Command Prompt from the list Select 'Safe Mode with Command Prompt'

    Windows 10 / Windows 8
    1. Press the Power button at the Windows login screen. Now press and hold Shift, which is on your keyboard, and click Restart..
    2. Now select Troubleshoot Advanced options Startup Settings and finally press Restart.
    3. Once your computer becomes active, select Enable Safe Mode with Command Prompt in Startup Settings window. Select 'Enable Safe Mode with Command Prompt'
  • Step 2: Restore your system files and settings
    1. Once the Command Prompt window shows up, enter cd restore and click Enter. Enter 'cd restore' without quotes and press 'Enter'
    2. Now type rstrui.exe and press Enter again.. Enter 'rstrui.exe' without quotes and press 'Enter'
    3. When a new window shows up, click Next and select your restore point that is prior the infiltration of Lost Files. After doing that, click Next. When 'System Restore' window shows up, select 'Next' Select your restore point and click 'Next'
    4. Now click Yes to start system restore. Click 'Yes' and start system restore
    Once you restore your system to a previous date, download and scan your computer with Reimage Reimage Cleaner Intego and make sure that Lost Files removal is performed successfully.

Bonus: Recover your data

Guide which is presented above is supposed to help you remove Lost Files from your computer. To recover your encrypted files, we recommend using a detailed guide prepared by security experts.

If your files are encrypted by Lost Files, you can use several methods to restore them:

Data Recovery Pro is the program designed to recover files encrypted by such malware

This third-party software can restore deleted files and data affected by Lost Files ransomware

  • Download Data Recovery Pro;
  • Follow the steps of Data Recovery Setup and install the program on your computer;
  • Launch it and scan your computer for files encrypted by Lost Files ransomware;
  • Restore them.

Windows Previous Versions can recover individual files

When System Restore gets enabled, Windows Previous Versions can get used as an alternate method instead of data backups

  • Find an encrypted file you need to restore and right-click on it;
  • Select “Properties” and go to “Previous versions” tab;
  • Here, check each of available copies of the file in “Folder versions”. You should select the version you want to recover and click “Restore”.

ShadowExlorer can work for file recovery on Windows devices

When Shadow Volume Copies are left untouched on the system, ShadowExplorer can be used to restore encrypted data

  • Download Shadow Explorer (;
  • Follow a Shadow Explorer Setup Wizard and install this application on your computer;
  • Launch the program and go through the drop down menu on the top left corner to select the disk of your encrypted data. Check what folders are there;
  • Right-click on the folder you want to restore and select “Export”. You can also select where you want it to be stored.

Decryption is not possible

Finally, you should always think about the protection of crypto-ransomwares. In order to protect your computer from Lost Files and other ransomwares, use a reputable anti-spyware, such as Reimage Reimage Cleaner Intego, SpyHunter 5Combo Cleaner or Malwarebytes

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. It is a hassle when your website is protected from suspicious connections and unauthorized IP addresses.

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 server or network manager that need to monitor connections and activities. This is how you bypass some of the authentications factors and can remotely use your banking accounts without triggering suspicious with each login. 

VPN software providers like Private Internet Access 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. It is better to clock the access to your website from different IP addresses. So you can keep the project safe and secure when you have the dedicated IP address VPN and protected access to the content management system.

Backup files for the later use, in case of the malware attack

Computer users can suffer from data losses due to cyber infections or their own faulty doings. Ransomware can encrypt and hold files hostage, while unforeseen power cuts might cause a loss of important documents. If you have proper up-to-date backups, you can easily recover after such an incident and get back to work. It is also equally important to update backups on a regular basis so that the newest information remains intact – you can set this process to be performed automatically.

When you have the previous version of every important document or project you can avoid frustration and breakdowns. It comes in handy when malware strikes out of nowhere. Use Data Recovery Pro for the data restoration process.

About the author
Gabriel E. Hall
Gabriel E. Hall - Passionate web researcher

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