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Tutorials

Useful tutorials on various PC troubleshooting topics. Video tutorials.

How to remove Coaq Ransomware and decrypt .coaq files

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Coaq Ransomware is the subtype of STOP Ransomware (or DJVU Ransomware) and has all the characteristics of this family of viruses. Malware blocks access to the data on the victim's computers by encrypting it with the AES encryption algorithm. STOP Ransomware is one of the longest living ransomware. First infections were registered in December 2017. Coaq Ransomware with such suffix is yet another generation of it and appends .coaq extensions to encrypted files. Following the encryption, the malware creates a ransom note file: _readme.txt on the desktop and in the folders with encoded files. In this file, hackers provide information about decryption and contact details, such as e-mails: support@freshmail.top and datarestorehelp@airmail.cc.

How to fix Roblox “Bad Request” error code 400

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Some users happen to see the "Bad Request" error code 400 while trying to launch Roblox in their browser(s). The issue indicates there is a connection issue between the game's client and server that receives the request. Here is a full error message that users can see: "Bad Request 400 | There was a problem with your request". This issue may be related to corrupted browser files, incorrect network settings, damaged DNS server cache, and even problems on the side of the server itself. You can check whether Roblox severs experience any issues at the moment using the official Roblox Server Status or DownDetector. If everything seems fine with the server, then the connection issue may originate from your PC and should be resolved individually. Follow our guide below to try each solution and potentially fix the "Bad Request" error code 400.

How to fix Valorant error code VAN 135

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Some people get unlucky to encounter connection issue VAN 135 (usually in Windows 10 or 11), which essentially prevents playing Valorant. As a rule, there are many error codes starting with VAN (like 1067, 57, 9001, etc.) and all of them frequently indicate some connection problem. This is the kind of message players tend to receive when seeing this error appear at the launch of the game: "CONNECTION ERROR VALORANT has encountered a connection error. Please relaunch the client to reconnect. Error Code: VAN 135". It can be either a server issue on the Valorant end (for example, temporary maintenance or shutdown) or an individual issue on a player's PC. In case there is something wrong with the Valorant server, the responsibility does not lie on you, and you should wait until the issue gets resolved on their end. You can check whether something is wrong with the server itself using the official status checker by Riot or DownDetector. If everything seems fine with the server, and you continue to stumble upon the same VAN 135 or similar connection issue, try solutions from our guide to resolve this issue. It is possible that there is a problem with your connection specifically.

How to remove Cosw Ransomware and decrypt .cosw files

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New instances of STOP Ransomware (DjVu Ransomware) continue to damage users files all over the world. STOP/Djvu Ransomware is a specific type of ransomware that has been active since 2017. It is a type of file-encrypting malware that encrypts victims' files and demands payment in exchange for the decryption key. This crypto-virus uses a complex AES encryption algorithm to block users' access to their data and extort a ransom of $490 or $980. One of the new variations of extension, that appeared in October 2022, is: .cosw. Corresponding ransomware got the name Cosw Ransomware. The virus adds such suffixes to the end of encrypted files. If your files got such an ending and are not accessible, it means your PC is infected with STOP Ransomware. Malware developers slightly modify the virus technically.

How to remove Goba Ransomware and decrypt .goba files

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Goba Ransomware, which is actually next generation of STOP Ransomware appeared in the beginning of March 2023. This virus encrypts users' essential files, such as documents, photos, databases, music with AES encryption and adds .goba extensions to affected files. This ransomware is almost identical to numerous previous versions of the malware, that we described earlier, and belongs to the same authors, and uses the same e-mail addresses (support@freshmail.top and datarestorehelp@airmail.cc) and the same Bitcoin wallets. Full decryption is almost impossible, however, partially your data can be restored using instructions in this article. After the virus finishes, it creates _readme.txt file with the ransom note on the desktop and in the folders with affected files.

How to remove WannaSmile Ransomware and decrypt .wannasmile files

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If your files have been suddenly altered with the .wannasmile extension (for example, 1.pdf.wannasmile) and you are now shown a ransom-demanding message in the pop-up window, then you are likely dealing with WannaSmile Ransomware. Although there is not enough justification for this, WannaSmile could be a new version of another identically named ransomware from 2017 (by Iranian developers), which assigned the .WSmile extension. In general, such malware is typically designed to render data inaccessible (by running encryption) and then extort money from victims for its decryption.

How to stop “Someone Matched With You On Tinder!” e-mail spam

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"Someone Matched With You On Tinder!" is likely a fake e-mail notification that is not related to Tinder. Although Tinder does send similar or even identical notifications to users, the one you received may be distributed by scammers. The purpose of this and other similar scam e-mail campaigns is to trick users into clicking on buttons or hyperlinks. One of the messages that got under the microscope of our team was encouraging users to click on the "FIND OUT WHO" button to see who is ostensibly a user's match. The website that this button led to asks users to pass a short questionnaire in order to reveal a list of neighboring women who "want to have sex" with the recipient.

How to remove Goaq Ransomware and decrypt .goaq files

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Developed by the Djvu family, Goaq Ransomware is a malicious program that runs extensive encryption of personal data. It uses popular, yet strong algorithms to put the stored files under severe lock. This, therefore, prevents users from succeeding in manual decryption. Knowing that users will not be able to recover files on their own, cybercriminals offer to decrypt data using their tools for a certain amount of money. The details that are presented inside a text note called _readme.txt, which is created after Goaq assigns new extensions to data. Specifically, it adds the .goaq extension so that encrypted files would look something like this 1.pdf.goaq. As soon as such changes are done, users will be no longer eligible to access their data.