In some cases, when starting ICQ, the user can see the message of such a content on the screen: "Your ICQ client is outdated and not safe." The reason for the occurrence of such a message is only one - an outdated version of ICQ.
This message suggests that at the moment the use of the version that is installed on your computer is unsafe. The fact is that at the time it was created, the security technologies used in it were very effective. But now hackers and attackers learned to break these same technologies. And in order to get rid of this error, you need to make one single thing - to update the ICQ program on your device.
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ICQ update instructions
You must simply just give the version of the ICQ that is on your device. If we are talking about the usual personal computer with Windows, you need to find ICQ in the "Start" menu list, open it and close to the startup label click on the uninstall ICQ).
On iOS, Android and other mobile platforms will have to use the programs like Clean Master. Max OS you need to simply move the program shortcut in the basket. After the program is deleted, you need to download the installation file from the official ICQ site again and start it for installation.
See also: The ICQ icon flashes the letter I - how to solve the problem
So, to solve the problem with the emerging message "Your ICQ Client is outdated and not safe," you just need to update the program to a newer version. It arises for the simple reason that you have an old version of the program on your computer. It is dangerous to the fact that the attackers can access your personal data. Of course, no one wants. Therefore, ICQ needs to be updated.