Kaspersky Anti-Virus is one of the most famous anti-virus programs. Its latest versions contain a built-in firewall and provide a fairly reliable computer protection against viruses and Trojans. For normal operation of the anti-virus, you need a license key file.
Instructions
Step 1
If the antivirus user sees a message that appears on the computer screen stating that the "black list" of keys is missing or damaged, this may indicate that this key is blacklisted and further normal operation of the antivirus program is impossible.
Step 2
The main reason why the key is included in the "black list" is its posting on one of the pirated resources for free download. Remember, did you share your key with someone? As a rule, the one to whom you presented the key gives it to someone else, that one else, as a result, the key very quickly gets into free access, after which it is added to the "black list" by the employees of Kaspersky Lab. A simple conclusion follows from this - after purchasing a license key, do not pass it on to unauthorized persons. Usually, a key available for free download gets into the black list within a few days, less often within a week or more (depending on the popularity of the resource on which it was posted).
Step 3
What if your key was blacklisted, but you did not give it to anyone? Perhaps there was some kind of failure, so first try to fix the situation using the recommendations of Kaspersky Lab specialists. Such recommendations have been issued for all versions of the antivirus. If the problem persists, contact Kaspersky Lab and report the problem. You will need to provide information about the license key, namely, the date and place of its purchase.
Step 4
If the key file nevertheless got into the network without your participation, then most likely it was simply stolen from your computer. This could happen if the backup copy of the key was stored on the computer in clear text. Do not forget that even a good antivirus does not guarantee 100% protection, as it can only protect against already known threats. The pledge of safety is not to visit questionable sites, not to launch unknown applications, to regularly update the operating system and the programs used. Store all important files (license keys, password files, etc.) on external media or in encrypted form. For example, just compress the folder with the files with the archiver and set a password for the archive.
