I am using KMPlayer 64X.
KMPlayer 64X does not run when F-Secure Antivirus is monitoring.
This is a false detection.
Hope this is resolved by the F-Secure team.
Thank you for reaching out to F-Secure Community.
You may follow the article below on how to whitelist the KMPlayer program on the F-Secure Anti Virus program:
Allow applications that DeepGuard has blocked
Since this is a false detection, you may submit the sample file to our lab team to analyze the file:
How can I submit samples to F-Secure?