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Tutorials

Useful tutorials on various PC troubleshooting topics. Video tutorials.

How to remove D7k Ransomware and decrypt .D7k files

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D7k is the name of a recently-discovered ransomware infection. Alike other infections within this category it is designed to encrypt system-stored data and extort money for its decryption from victims. During encryption, all targeted files will get .D7k extension and reset their icons to blank. As a result, users will no longer be able to access their files, even after manually removing the newly assigned extension. Once successful encryption gets to its finish, the virus creates a text file called note.txt, which contains decryption guidelines. The note contains a short text demanding 500$ dollars for file decryption. This amount is to be sent to the bitcoin wallet attached by cybercriminals. The message does not include any communication channels, which makes the decryption process ambiguous. Paying the ransom is not recommended because many cybercriminals fool their victims and do not send promised decryption means in return. However, in this case, it appears to be even riskier due to the lack of any communication channels to contact the extortionists. Despite this, cybercriminals are usually the only figures able to unlock access to data completely and safely. The moment this article was written, no public third-party tools are known to bypass the ciphers assigned by D7k Ransomware. Decryption using third-party tools or windows shadow copies using is possible only in rare cases when the ransomware is flawed or accidentally faulted during its operation for whatever reason. Otherwise, the only ways to recover your data are either by collaborating with ransomware developers or retrieving data from existing backup copies. Backups are copies of data stored on external devices such as USB drives, external hard drives, or SSDs.

How to remove Jycx Ransomware and decrypt .jycx files

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Jycx Ransomware (in other classification STOP Ransomware or Djvu Ransomware) is harmful malware, that blocks access to user's files by encrypting them and requires a buyout. It was released in the last days of March 2023 and hit tens of thousands computers. The virus uses an unbreakable encryption algorithm (AES-256 with RSA-1024 key) and demands a ransom to be paid in Bitcoins. However, due to some programming mistakes, there are cases when your files can be decrypted. A version of STOP Ransomware, that we are considering today, adds .jycx extensions to encrypted files, and therefore got the name Jycx Ransomware. After the encryption, it presents file _readme.txt to the victim. This text file contains information about the infection, contact details, and false statements about decryption guarantees. The following e-mails are used by malefactors for communication: support@freshmail.top and datarestorehelp@airmail.cc.

How to remove Hairysquid Ransomware and decrypt .Hairysquid files

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Hairysquid is a newly-discovered variant of the Mimic ransomware. After penetration, it modifies the Windows GroupPolicy, deactivates protection by Windows Defender, and disables other Windows features to exclude any deterrence of its malicious activity. The goal of this infection is to encrypt access to system-stored data and demand money for its decryption. During the encryption processes, the virus attaches the .Hairysquid extension to all affected files. Once done, a file like 1.pdf will turn to 1.pdf.Hairysquid and change its icon eventually. Instructions on how to decrypt the blocked data are presented within the READ_ME_DECRYPTION_HAIRYSQUID.txt note, which gets created alongside successful encryption. Overall, it is said victims have been attacked by ransomware, which encrypted their data. In order to reverse the damage and get back the files, victims have to contact the swindlers via one of the provided communication channels (TOX messenger, ICQ messenger, Skype, and email) and pay for decryption in Bitcoins. The price for decryption is said to be calculated based on the number and potential value of encrypted data. In addition, it is also allowed to test decryption for free by sending 3 locked files to cybercriminals. Alas, it is usually impossible to decrypt blocked data without the involvement of cybercriminals themselves.

How to remove Jyos Ransomware and decrypt .jyos files

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Jyos Ransomware (a.k.a Djvu Ransomware or STOP Ransomware) encrypts victim's files with Salsa20 (stream encryption system) and appends one of the hundreds of possible extensions, including the latest discovered .jyos. This one appeared in the very end of March 2023 and infected thousand computers worldwide. STOP is one of the most active ransomware today, but they hardly talk about it. The prevalence of STOP is also confirmed by the extremely active forum thread on Bleeping Computer, where victims seek help. The fact is that this malware attacks mainly fans of pirated content, visitors to suspicious sites, and is distributed as part of advertising bundles. There is a possibility for successful decryption, however, to date, there are more than two hundred STOP Ransomware variants that are known to researchers, and such a variety significantly complicates the situation.

How to remove Jypo Ransomware and decrypt .jypo files

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Jypo Ransomware is the next generation of STOP Ransomware family from the same authors. The ransomware family is known for its widespread distribution and frequent updates with new variants. Like other members of the Djvu family, Jypo Ransomware is designed to encrypt the victim's files and demand a ransom payment in exchange for the decryption key. The ransom note left by Jypo Ransomware instructs the victim to contact the attackers via email to negotiate the ransom payment.This virus aims important user's files, such as documents, photos, databases, music, mail. Ransomware encodes them with AES encryption and adds .jypo extensions to affected files. All these variations use similar algorithms, that are unbreakable, however, in certain conditions .jypo files, encrypted by the ransomware, can be decrypted using STOP Djvu Decryptor (provided below). This version of STOP Ransomware uses the following e-mail addresses: support@freshmail.top and datarestorehelp@airmail.cc. Jypo Ransomware creates _readme.txt ransom note file.

How to unlock from “iPhone Unavailable, try again in 5 minutes” screen

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If you forgot your passcode and have been entering it wrong for a couple of attempts in a row, then you will encounter a message like "iPhone Unavailable, try again in 5 minutes". The time range for when your iPhone will be unavailable depends on how many attempts you have exhausted to unlock the device and can reach 60 minutes of waiting. After 10 failed attempts, the "iPhone Unavailable" message will no longer contain any timer meaning a permanent block of your iPhone. In such a case, the only way to unlock your phone is to reset it to factory settings by erasing all stored data. While this may be frustrating to the actual iPhone owners, such a security measure is extremely useful to keep your iPhone content safe from the hands of intruders. Thus, make sure you try your best to unlock your iPhone with the right passcode. If the next few attempts become desperate and your iPhone becomes permanently blocked, then you will have to use one of our solutions below to reset your device, which will unlock it eventually. Feel free to use whichever fits you the most.

How to remove Jywd Ransomware and decrypt .jywd files

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Jywd is a ransomware infection originating from the Djvu/STOP family. This family is a group of developers responsible for infecting a bunch of users with different file encryptors. Jywd is new, appeared in the end of March 2023, but has traits very similar to its precursors. Jywd Ransomware, like other variants of the STOP/Djvu Ransomware family, uses a combination of AES-256 and RSA-1024 encryption algorithms to encrypt the victim's files. AES-256 is used to encrypt the files themselves, while RSA-1024 is used to encrypt the AES-256 key. This makes it extremely difficult to recover the encrypted files without the decryption key. The virus encrypts personal data while assigning the .jywd extension. To illustrate, a file called 1.pdf will experience a change to 1.pdf.jywd and reset its original icon after successful encryption. In order to decrypt the blocked data, victims are given instructions to follow inside a ransom note (_readme.txt).

How to fix Windows Update error 0x800f0806

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0x800f0806 is a popular error code that marks itself known while trying to install an update on Windows 11. According to most reported issue scenarios, the error is triggered when failing to install Cumulative Update for Windows 11 Version 22H2 (KB5017321). The most common reasons for this update problem are often related to corrupted system files, damaged update components, bugged Windows Update service, incompatibilities caused by antivirus software, and other possible causes as well. To fix the 0x800f0806 error and install the problematic update, try each solution from our guide until one of them finally bypasses the issue. If you have not tried this alternative yet, we suggest beginning your fixing journey with the in-built Windows Update Troubleshooter. Although it may not have a high success rate for resolving such issues, cases when this feature can still be effective and save you quite a significant amount of time. Follow the steps below to try this feature and rectify the detected issues.