That is most likely the problem.
You can try to add exceptions to it, but I have never been able to get F-Secure to work well with HM1 - http://faq.holdemmanager.com/questio...%28Firewall%29
If you continue to have problems, try the following -
Many of those free Norton, Mcaffee, Comodo, Zonealarm, etc, 'internet security' bundles will not work well with holdem manager.
Please do the following steps, so we can get your computer to a state that we know will work with Holdem Manager:
1) Uninstall any 3rd party security software bundles.
2) Reboot your computer
3) Please install the latest version: http://rvgsoftware.fileburst.com/HmBetaUpdate.exe
4) Enable Windows Firewall's recommended settings through your Control Panel, turn off Windows Defender, and add firewall exceptions for HM and SQL - http://faq.holdemmanager.com/questio...ender+Problems
5) Install Microsoft Security Essentials for antivirus/malware protection and update it - Microsoft Security Essentials - Free Antivirus for Windows