How can I decrypt a file

Summary

Encrypting files with EFS (Encrypting File System), Bitlocker, or other encryption methods can greatly improves the data security. But how to decrypt encrypted files without a password, or certificate? Follow the encrypted file recovery tips here to troubleshoot. For ransomware encrypted file recovery, you can use EaseUS Data Recovery Wizard to help you recover the deleted original files with ease.

 Download for PCDownload for Mac

Questions About How to Decrypt Files

Q1: "I recently encrypted some of my files in Windows 10 and kept my encryption key in my Documents folder in C drive. I reinstalled Windows OS the other day, and the encryption key was lost due to formatting. Can I decrypt the file without the certificate?"

Q2: "Unknown viruses encrypted all files and folders on my USB pen drive. I was threatened to pay Bitcoin to recover encrypted files, which I don't want to. I need a way to decrypt encrypted files without a password."

Overview of Encrypted File Recovery

Sometimes we tend to protect privacy by using some file encryption tools, such as EFS (Encrypting File System), which provides the core file encryption technology used to store encrypted files on NTFS file system volumes. So only with a certificate can people access the EFS locked files. 

 

How to Encrypt a File in Windows 10/8/7

1. Find the file or folder you wish to encrypt.

2. Right-click the file/folder and click "Properties." Then, click the "Advanced..." button on the General screen.

3. Check the box "Encrypt Contents to Secure Data" under the Compress or Encrypt attributes section, then click the "OK" button.

4. Continuing clicking the "OK" button. An encryption warning box will pop up.

5. Check the "Encrypt the File Only" box to encrypt the individual file, then click "OK" to finish.

Note: If you copy unencrypted files to a folder with encrypted property, they will be automatically encrypted.

EFS encryption is transparent. If you encrypt some data, you can access this data without any restriction. And you can decrypt the files system by unchecking the "Encrypt Contents to Secure Data" feature. Yes, this only works for the file system, not your specific file. If you want to decrypt files, the certificate or password is indispensable.

How to Decrypt Encrypted Files Without Password/Key

If you haven't exported and backed up the file encryption certificate before or if you have forgotten the password, you cannot decrypt encrypted files in the following situations.

  • Reinstalling Windows OS
  • Moving encrypted files to another computer
  • Recovering data from an encrypted disk

Suppose that you really need to decrypt files, you can search and try some online decryption tools. But you need to be aware that these tools are not 100% safe. You may be at risk of data theft or source data corruption. So think twice before trying these programs.

In addition to this case, where users actively use tools to encrypt, there is another unexpected way of files being encrypted, which is by viruses or ransomware. For example, ransomware encrypts and deletes files. In the next part, we will show you how to use a reliable ransomware encrypted file recovery tool to get back data without paying the ransom. 

How to Recover Files Encrypted by Ransomware

Since most ransomware encrypts your files and folders by three steps: make an exact copy of files and folders > encrypt the copy > delete the source files. How this works gives you a great opportunity to recover the encrypted files through professional data recovery software.

Here, we highly recommend you try EaseUS Data Recovery Wizard. This virus attack data recovery program enables you to recover files infected by shortcut virus, restore files deleted and encrypted by ransomware like Locky, CryptoLocker, CryptoWall, and TorrentLocker, without paying.

Now, download this capable data recovery tool and start to recover ransomware encrypted files within three steps. Note that this is just for file recovery of shortcut virus or ransomware, not including those by encryption tools.

 Download for PCDownload for Mac

Step 1. Launch EaseUS Data Recovery Wizard. Select the disk partition or storage device where you lost files and click the "Scan" button.

Step 2. This program will quickly start a scanning process to find lost files. When the process accomplishes, you can double-click files to have a preview before selection.

Step 3. Choose the files you want. Then click the "Recover" button to get them back. You should save the data to another safe spot in your PC/storage device, not where they lost.

Do You Need Specialized Data Recovery Services?

You may need further help for tough data loss situations like reformatting drive, RAW disk, partition loss, repartition failures and system boot error. Consult with EaseUS Data Recovery Experts for cost-efficient one-on-one manual recovery service. They could offer the following services after FREE diagnosis:
1. Unformat the drive
2. Repair the RAID, RAW disk or operating system
3. Recover lost partition (the one that cannot be recovered by software)

Activate Live ChatCall Us 1-800-570-4634

Sum Up

You can use EFS or Bitlocker to encrypt your files and data. But to avoid losing the password, key, or certificate and not being able to decrypt files, we suggest you back up your encryption certificates and keys to a safe location, and remember your EFS backup password.

For solving the encryption problem caused by ransomware, the most important thing is preventing virus infection. Install and enable the anti-virus software on your computer. Moreover, back up important data and files on your computer regularly.