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Tutorials

Useful tutorials on various PC troubleshooting topics. Video tutorials.

How to fix “ffmpeg.dll was not found” error

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The program can’t start because ffmpeg.dll is missing from your computer. Try reinstalling the program to fix this problem. or The code execution cannot proceed because ffmpeg.dll was not found. Reinstalling the program may fix this problem. are two kinds of messages that users may encounter while trying to launch and use various third-party apps. Since ffmpeg.dll is related to ensuring proper audio functioning, the issue is likely to target applications like Discord, WhatsApp, Skype, and others linked with sound features. The reason for the error appearance is either because ffmpeg.dll is missing or got corrupted, which does not let the application function correctly. DLLs (Dynamic Link Library) are crucial components that serve a key role in ensuring the proper operation of various software. Luckily, solving DLL issues is not big of a deal. Follow our guide below and try each solution we propose. At some point, the issue should get resolved eventually, and revive the problematic app back to working without errors.

How to remove Goldoson malware (Android)

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It was identified by McAfee that 60 legitimate apps (in Google Play and South Korea’s ONE Store) have been infiltrated with a malicious library identified as "Goldoson". Please note that the apps themselves are fully legitimate and were not meant to be malicious by their developers. It is the third-party library, to which these apps were connected and which suddenly got injected with Goldoson malware. The downloads for these apps range from 1 million to even 10 million downloads, meaning a lot of innocent users have become victims of this malicious library. The malware itself is capable of collecting sensitive data from installed apps, Wi-Fi/Bluetooth-connected devices, and the user's GPS location as well. In addition, it was discovered that Goldoson malware can stealthily click on advertisements in the background with a special HTML code. This, therefore, helps cybercriminals generate additional revenue from infected users. Although this malware does not have as disruptive capabilities as banking trojans, it is still enough to put users' safety and privacy at risk. Luckily, a number of applications from Google Play have removed the malicious library and are safe to use after installing the latest update. Some, unfortunately, did not do it in time and are no longer available in Google Play.

How to remove Recov Ransomware and decrypt .recov files

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Recov is a new ransomware variant of the VoidCrypt family. After infiltrating a system, it runs data encryption (to prevent victims from accessing files) and tells victims to pay for a kit of decryption software + RSA key for unlocking the files. Instructions on how to do it are presented inside the Dectryption-guide.txt ransom note. One more thing that this ransomware does is assigning visual changes to encrypted files - a string of characters consisting of the victim's ID, cybercriminals' e-mail address, and the .Recov extension will be added to filenames. For instance, a file originally named 1.pdf will be changed to 1.pdf.[MJ-TN2069418375](Recoverifiles@gmail.com).Recov or similarly. Cybercriminals demand that victims establish contact with them via e-mail (Recoverifiles@gmail.com or Recoverifiles@protonmail.com in case of no answer). While it isn't made clear what extortionists need, it is likely that they will require their victims to pay a certain fee for a decryption tool and RSA key that are available only to the developers.

How to remove Kadavro Vector Ransomware and decrypt .vector_ files

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Kadavro Vector is a ransomware program oriented toward English, Russian, and Norwegian-speaking users. The purpose of this virus is to encrypt potentially important data and extort money from victims for its decryption. While rendering files inaccessible, the malware also appends the .vector_ extension to targeted files. For instance, a file originally named 1.pdf will experience a change to 1.pdf.vector_ and reset its original icon. Very soon after successful encryption, Kadavro Vector force-opens its pop-up window containing decryption guidelines. Additionally, desktop wallpapers get changed as well. The ransom note instructs victims to not turn off the Internet and their computer as it may otherwise lead to damage to encrypted data. To return the data, victims have to purchase Monero (XMR) cryptocurrency worth $250 and send it to the cybercriminals' crypto address. In addition, there is also a timer indicating how much time users have to pay for decryption. Should victims not manage to do so within the allocated time frame, it is said that all files will be deleted using high-edge algorithms, making them permanently unrecoverable in the future. By doing so, threat actors try to put extra pressure on victims and thereby force them to meet the decryption demands.

How to remove Coty Ransomware and decrypt .coty files

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Coty Ransomware is a part of a large STOP/Djvu Ransomware family. It got its name because the original versions of the malware added the .stop (later .djvu) file extension and encrypted them with a combination of AES and RSA cryptography to make files inaccessible on the infected Windows computer. Coty Ransomware according to its name adds .coty extension. This version appeared in the end of April 2023. Once the Coty/STOP ransomware completes the encryption procedure, the virus creates a ransom note to _readme.txt file. The message of the scammers says that the victims must pay the ransom within 72 hours. The authors of the STOP virus are demanding $490 during the first three days and $980 after this time period. To provide confirmation, hackers allow 1-3 "not very large" files to be sent for free decryption to support@freshmail.top or datarestorehelp@airmail.cc for a test.

How to remove Cooper Ransomware and decrypt .cooper files

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Cooper is a ransomware virus that infects systems to encrypt potentially important files and demands money for their decryption. Along with running secure encryption, it also assigns the .cooper extension to affected files. For instance, a file originally named 1.pdf will change to 1.pdf.cooper and lose its original icon. After this change, files will no longer be usable, even if you remove the added extension. To reverse these changes, decryption instructions are presented within the Cooper_Recover.txt file. Cybercriminals urge victims to contact them via e-mail and pay for unique decryption software. Threat actors are the only figures who have access to it, and it is said no other tool is able to provide decryption for enciphered .cooper files. While contacting, victims are also asked to include the ID in the subject line of an e-mail message. Unfortunately, unless you have an available backup that can be used to retrieve copies of encrypted files, paying the ransom to cyber-crooks might be the only way to return back your files. Multiple ransomware infections use strong encryption algorithms and generate online keys, ensuring decryption is barely possible without the help of initial developers.

How to fix Windows Update error 0x8024500c

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Some users happen to face the 0x8024500c error, which prevents the successful installation of new updates. Such errors have been quite a common occurrence over the entire Windows existence. The reasons why they occur often come from corruptions in system files, misconfigured settings, bugged update services, incompatibilities of third-party security software, and even malware infection in rarer cases. Identifying the root of the problem and finding the right solution may be impossible to do immediately. This is why it is important to try each solution until one of them fixes the issue. Here are our top seven methods that will help you deal with the error 0x8024500c.

How to remove Coza Ransomware and decrypt .coza files

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Coza is a new ransomware sample developed by the notorious STOP/Djvu group of extortionists. Alike many other variants published by these cybercriminals, this one employs an almost identical encryption and extortion pattern. Upon settling down on an infected machine, the virus starts scanning and therefore encrypting potentially important pieces of data. By doing so, the virus aims to create more incentives for victims to pay for decryption proposed by the attackers. In addition to encryption, the malware also makes sure victims can differentiate locked from non-locked files – by simply assigning the .coza extension. For instance, a file previously named 1.xlsx will change to 1.xlsx.coza, 1.pdf to 1.pdf.coza and so forth with other targeted file types. To undo the encryption, victims are said to follow instructions within the _readme.txt text note.