How can help me to decrypt .Topi file in Help, my files are encrypted! Posted February 21 · Report reply Hello @Jonathan Lianlian, Welcome to the Emsisoft Support Forums. General Notes With Regards to STOP/DJVU Why won't the decrypter run? The decrypter requires version 4.5.2 or newer of the Microsoft .NET Framework, so this could mean your version of the .NET Framework is out of date. We recommend installing the latest version of the .NET Framework (4.8 at the time of writing this), and then trying the decrypter again. What does "Remote name could not be resolved" mean? It's an indication of a DNS issue. Our first recommendation is to reset your HOSTS file back to default. Microsoft has an article about this at the following link:https://support.microsoft.com/en-us/help/972034/how-to-reset-the-hosts-file-back-to-the-default If the decryption tool tells you the files cannot be decrypted, then they cannot be decrypted. That is not an error message. If your files have an Online ID that means that the files encryption keys were generated and stored on a command & control server under the control of the ransomware gang responsible for encrypting your files. We do not have access to those keys. If your files have an Offline ID and were not decrypted it is because we do not have the corresponding decryption key in our database. Do not ask us when we plan on adding it, because we do not have it or a way for generating your decryption key. Our database does include some Offline ID decryption keys for newer variants of the STOP/DJVU family of ransomware. If the files were encrypted with an Offline ID that matches one of the decryption keys in our database, then our decryption tool will be able to decrypt those files that were encrypted using that key. New Variant STOP/DJVU utilizes both the RSA and Salsa20 encryption algorithms. Both RSA and Salsa20 are considered secure encryption methods and are unbreakable using current technologies. They are not reversible, cannot be cracked, and we are not able to generate a decryption key. So do not send us encrypted files thinking we can recover your decryption key, we can't. Old Variant STOP/DJVU. If our decryption tool cannot decrypt the files, submit file pairs to https://decrypter.emsisoft.com/submit/stopdjvu/ Old Variant STOP/DJVU. The decrypter can't decrypt all of my pictures even though I submitted file pairs for them? JPEG/JPG images have a format oddity that causes file pairs to be specific to each source of pictures, rather than the file format in general. As an example, if you have pictures from two different cameras, and submit a file pair from the group of pictures from one of the cameras, then the decrypter will only be able to decrypt files from the camera that the file pair came from. In order to decrypt all JPEG/JPG images, you will need to submit file pairs from every source you've obtained those pictures from. Also, see https://support.emsisoft.com/topic/32045-about-the-stopdjvu-decrypter/ for more information on the STOP/DJVU decryption tool.