I don't think I can help with your specific issue, because it's a bit too technical for me, but I do know that you can only install the trial version of F-Secure once, so that may be one of your problems.
McAfee would certainly be another problem, so if you intend to use F-Secure, you need to ensure that McAfee is completely removed. Here is a list of Uninstallation Tools, but I'm not sure how current they are, so you may want to do another search for that.
Further, if you choose to continue to use F-Secure, as you have already tried to install it unsuccessfully, I would recommend that you run the F-Secure Uninstallation Tool to remove all possible debris from a previous attempt, and start again.
This topic has been closed due to inactivity. If you would like to discuss this topic further, please start a new post.
You can reference this topic in your post by adding this link:
Visit the Community
Check our Forums or How-to & FAQs for advice or answers
View User Guides
Refer to our getting started guides and product manuals
Talk to our Support agents and get answers to your questions