How to remove Topi virus and restore encrypted files

This article is dedicated to Topi virus which infects user's PC around the world, and encrypts their files. In this entry we've compiled full info on Topi's essence, and how to uninstall Topi from your laptop. In addition, we will explain how to restore the cyphered data, if possible.

Topi ransomware virus

Topi is the dangerous program infecting computers mainly with help of e-mail spam and Trojans. Occasionally web-criminals use exploits to get into the PC, but they are quickly fixed. After the infection, the virus examines the PC memory to find the files to be cyphered and their general cost. Now, any modern virus is able to cypher text, audio, video and image info in all known extensions. Ransomware encrypts all files, but the ones that look like business correspondence go first. Topi targets only files with information, and does not affect the software, so that the man can pay the ransom via his computer. Encryption is performed with the help of world-known AES and RSA algorithms, and its intricacy is so high that decipherment of files without a key is impossible. This is the base for such a stunning success of this kind of viruses in recent years: usual customer, even having a good knowledge of the computer, will not ever be able to recover the data, and will need to pay the price. The single method to decrypt the data is to find the fraudster's site and obtain the master key. In addition, there is a way to get these keys via defects in viruses’ program code.

The computer knowledge is extremely significant in progressive world, as it assists customer to guard the PC from undesired programs. Unfortunately, most people comprehend the importance of computer knowledge just when ransomware takes over their computers. You easily can decrease the chances to get encrypting virus if you will follow these principles:

  • Take notice to the pop-up windows. If virus infects the computer, it will try to eliminate all copies of the data, to decrease the chances of restoration. However, removal of shadow copies requires administrator rights and user's confirmation. The second of thinking before verifying the checkbox can save your data and your efforts.
  • Keep an eye on the status of your laptop. Data encrypting is a complex operation that needs a high amount of system resources. In the first minutes after the infection, the CPU speed decreases, and the encryption, process is visible in Process Manager. You may anticipate this moment and unplug the computer before information will be broken. This, in case of infection, will protect a lot of your information.
  • Closely study your mailbox, especially those messages which have files attached to them. If you do not know the person who send an e-mail and it notifies about earning any prize, a lost package or something like that, this could be a fraud letter. The second very common kind of such letters is a "business letters". Lawsuits, Invoices for services or products, claims, summaries and suchlike specific documents do not be sent accidentally, and you, as a minimum, should know the sender. Otherwise, it is a fraud.

You should know that the elimination of the virus is just a first and mandatory turn for the normal operation of the workstation. If you get rid of ransomware, you will not restore the data instantly; it will take multiple measures written down in the next section. In case of encrypting virus, we do not provide the manual removal instruction, because its complexity and the likeliness of faults will be too high for regular user. Some ransomware cannot be removed even with help of AV-program, and have many serious types of defense. The very effective viral protection manner is the uninstalling of information in event of data recovery or ransomware removal attempt. To avoid this, abide to the advices under this paragraph.

Removal instruction

Step 1. Boot into Safe mode

Safe mode

Start -> Msconfig.exe

Safe mode. Step 1

On the tab Boot select Safe boot

Safe mode. Step 2

Step 2. Check Startup folder

Start -> Msconfig.exe ->Disable unknown programs in the Startup tab


Step 3. Check hosts file

Modify hosts file, that located in C:\Windows\System32\drivers\etc\ .

Hosts file.Step 1

Open the file with Notepad and delete suspicious strings.

Hosts file.Step 2

It has to look like this:

Hosts file.Step 3

Step 4. Scan the system with antiviral scanner

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Step 5. Disable Safe mode

Start -> Msconfig.exe ->Disable Safe boot in the Boot tab

Deactivate Safe mode

If you performed all conditions, mentioned in previous paragraph - it is time to decrypt the files. We will not try to reverse the encryption, but we will get them back via OS features and the special software. There are the some exceptions, but usually data restoration requires lots of time and money. If you choose the manual file recovery - read our entry, which describes all the most efficient manners.

To restore information, follow the article about files decryption.

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