I am trying to instal Safe Antivirus in my desktop but getting an error as per the attached screen shot. Don't know how to solve. Can you help on this.
Sorry for my reply.
If there missing previous (or current-time) another security software.
Maybe can be helpful try with F-Secure Uninstall Tool.
--> THIS TOOL able to uninstall (potentially) other F-Secure software too.
So if you have installed something as their VPN (Freedome) or Password manager (F-Secure Key) - potentially it can be removed by this tool too. And maybe before this step - you have to be sure about backup for information (as for passwords/subscription-credentials).
MAYBE (your screenshot looks like branding for F-Secure) provider also have option about their "uninstall tool".
Usually this kind of trouble can be about situation, when some of installation-files/resources get stuck.
If this suggestion not an option and will be not helpful - maybe there can be another suggestions.