1, first to see if your network has failed, if it is a network failure, it must not be updated. So first determine whether the network problem first.
2, if it is not a network problem, we can try to change the way the server to update, in the open Kaspersky interface to find "Update" option, and then update the above set up the server, such as the Korean and Russian servers to update your Kaspersky antivirus software. Then when you select the server can not update Kaspersky, then we can do is to wait for the server to maintain good after the normal update Kaspersky.
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3, if you find that it is not a server failure or network failure, then it may be your computer or Kaspersky software itself has failed, such as the system is damaged. The situation where the Kaspersky application was lost. Then it is recommended to reinstall your Kaspersky software, if the Kaspersky is still unable to update, then the computer reload it. There are no important documents on your computer.
Believe that the above three methods can solve the problem that Kaspersky can not update.