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Tutorials

Useful tutorials on various PC troubleshooting topics. Video tutorials.

How to remove Zouu Ransomware and decrypt .zouu files

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Being part of the Djvu and STOP virus family, Zouu Ransomware is a file-encrypting virus that has been strolling around the web since the middle of January 2023. In fact, developers distribute a plethora of versions that vary from each other by extensions, cybercriminals' e-mail, and other details. There are over 600 extensions that STOP Ransomware has used to attack the user's data. In our case, STOP Ransomware appends .zouu extension to files so that they become encrypted. For instance, something like 1.mp4 will be retitled to 1.mp4.zouu and reset its default icon after infection. Sequentially, the program creates a note called _readme.txt that contains ransom information. Usually, the generated content looks very similar in all ransomware types.

How to stop “Professional Hacker Managed To Hack Your Operating System” e-mail spam

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"Professional Hacker Managed To Hack Your Operating System" is a popular spam message designed to bait inexperienced users into thinking their computer has been hacked and therefore used for extracting explicit/private content from it. In fact, all the claims made by this or similar spam messages are fake and have nothing to do with what they say. The message usually claims that cybercriminals gained access to various recording devices (e.g., camera, microphone, screen) and have used them for recording sensitive content without users' permission over the course of several months. It is said that threat actors managed to infiltrate a spyware virus which allowed them to get explicit recordings of e-mail recipients watching adult content on pornography websites. To keep the non-existent recordings unpublicized, scammers give 50 hours to pay 850 USD or 1750 EUR in Bitcoin cryptocurrency - or otherwise, the content will be leaked and shared with users' contacts. As we already mentioned, the "Professional Hacker Managed To Hack Your Operating System" and other similar spam campaigns are designed to spread fake information and make users believe in non-existent threats. Thus, paying scammers is pointless and will simply end up being a waste of your money. Even if sometimes such messages partially coincide with what a person was doing, there is still nothing to worry about due to the aforementioned. Spam messages are countless and can be titled in different ways, such as "Your personal data has leaked due to suspected harmful activities.", "Ihre persönlichen Daten sind wegen des Verdachts auf schädliche Aktivitäten nach außen gelangt." and so forth. Beware of such messages and read our guide with useful tips on how to avoid such e-mail scam techniques and lower the chance of their delivery.

How to remove Zoqw Ransomware and decrypt .zoqw files

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Zoqw Ransomware, being a part of STOP Ransomware is a critical virus, endangering user's personal files. It belongs to the family of file-encrypting malware, that uses the AES (Salsa20) algorithm and unbreakable key. This virus is, sometimes, called Djvu Ransomware, after the word used as an extension in the first versions (.djvu). The variant of the threat, that we describe today, modifies files with .zoqw extension appeared in first half of January 2023 and acts exactly the same in comparison with dozens of previous versions. Files are encrypted with a secure key and there are quite small chances to decrypt them completely, especially if an online key was used. However, certain manual methods and automatic tools, described in this article can assist you in successfully decrypting some data. In the text box below you can find the "ransom note" - a small text file with a brief virus introduction and instructions to pay the ransom.

How to remove Bpto Ransomware and decrypt .bpto files

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One of the main computer security threats today is ransomware. Those are devastating computer viruses, that encrypt users' files using various cryptographic algorithms and extort ransom money for the decryption key. It is especially sensitive for users, as it attacks either personal files such as videos, photos, music, or business data such as MS Office file formats, e-mails, databases. Such files can be crucial for business operation or extremely important personally as part of family memory. Malefactors can demand from several hundred to several thousand dollars as a ransom. STOP Ransomware is officially the most widespread and therefore most dangerous ransomware threat. There've been more, than 650 versions of this virus in 5 years. Each variation infects thousands of computers, and there are millions of victims of this nasty malware. In this article, we will explain typical methods to fight Bpto Ransomware and decrypt affected files. In today's focus, versions of STOP (Djvu), that add .bpto extensions. Recent samples use a very similar pattern to infiltrate PCs and encrypt files. After encryption, ransomware creates a file (ransom note), called _readme.txt.

How to remove Theva Ransomware and decrypt .theva files

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Theva is the name of a ransomware virus that encrypts system-stored data and demands victims to pay money in Bitcoin for its decryption. During encryption, targeted files end up visually altered - for instance, 1.pdf will change to 1.pdf.[sql772@aol.com].theva and so forth with other files. Upon successful blockage of data, Theva Ransomware represents its decryption instructions in a text document called #_README_#.inf. It also changes victims' desktop wallpapers. In order to recover the data, victims are urged to contact cybercriminals via the given e-mail address (sql772@aol.com) and pay the ransom in Bitcoin cryptocurrency. It is said the price for decryption depends on how fast victims establish contact with swindlers. Following successful payment, threat actors promise to send the necessary decryption tool that will unlock all blocked data.

How to fix Windows Update error 0x80246019 on Windows 11

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0x80246019 is an error code that may appear and prevent users from installing a new Windows update. This issue has mostly been reported to happen on Windows 11, however, there are also cases when it occurs on Windows 10 too. The most common scenario that triggers this error is users are trying to update their Windows 11 to the newer version 22H2, but other updates can also be involved. Here is the message that users face when updating fails due to this error: We couldn't install this update, but you can try again (0x80246019). Error 0x80246019 and other update issues are usually caused by system file corruption, damaged Windows update file, interference from third-party antivirus, and interference from connected USB devices as well. Whatever it is, you are not alone, and be sure you will fix this issue eventually - simply try each method from the instructions in our article below until the error no longer comes in appearance.

How to remove Eternity Ransomware and decrypt .ecrp files

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Eternity is a ransomware virus that was discovered by Cyble researchers. This piece of malicious software belongs to the Eternity malware family and is designed to extort money from victims by encrypting potentially valuable data (with secure AES and RSA cryptographic algorithms). Dasha is another popular ransomware variant from this family. There are two known versions of Eternity - one does not change files visually and the other assigns the .ecrp extension to filenames and alters original icons. For instance, 1.pdf may either remain the same or become 1.pdf.ecrp after encryption depending on which ransomware version attacked the system. After successfully completing encryption, Eternity displays a pop-up window containing decryption instructions. Because Eternity Ransomware is a public Malware-as-a-service (MaaS) virus, which many threat actors may buy, the content of instructions (contact details, ransom size, countdowns, etc.) may slightly vary as well. Below are examples of ransom texts from two ransomware variants.

How to remove Black Hunt Ransomware and decrypt .black files

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Black Hunt is a malicious infection classified as ransomware. Upon infiltration, it begins encrypting data and then blackmails victims into paying for decryption (in #BlackHunt_ReadMe.hta and #BlackHunt_ReadMe.txt ransom notes). While running encryption, the virus also assigns the victim's ID, cybercriminal's email address, and .black extension to influenced files. To illustrate, a file originally named 1.pdf will change to something like 1.pdf.[nnUWuTLm3Y45N021].[sentafe@rape.lol] and acquire the new Black Hunt icon as well. Desktop wallpapers get altered as well. Inside the ransom notes cybercriminals state victims have 14 days to contact them by e-mail and buy a unique key for decryption. Unless the deadline is met, threat actors say they will start selling or leaking the collected data to various third-parties. Victims can review their "data situation" via the provided TOR link.