If Kaspersky Anti-Virus 2018 installed on your computer displays the error “Activation error. Unable to connect to server“, then in order to resolve the problem, perform the following actions:
1. Check whether your computer is not infected by the Kido networm
You can find detailed information on how to disinfect the networm in the article How to remove network worm Net-Worm.Win32.Kido (aka Conficker, Downadup).
2. Check your Internet connection
Check if you have the Internet access: launch the browser Internet Explorer and open the Kaspersky Lab website.
3. Configure your Firewall
If Firewall is installed on your computer, make sure that an allowing rule is created for the process avp.exe in the Firewallsettings.
Firewall secures your computer protection on local networks and Internet. Firewall is a program which monitors data transfered via Internet or local networks. According to the Firewall settings, it blocks or allows data transferring.
4. Check the system date
For detailed instructions on how to check the system date on your computer, see this article.
5. Try to activate later
If the recommendations did not help, try to activate later (in about an hour).
6. Contact Kaspersky Lab Technical Support
If the issue persists, create a request to Kaspersky Lab Technical Support via the My Kaspersky service. Describe your problem in detail.