Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.
More information on the scanning and removal options available in your F-Secure product can be found in the Help Center.
You may also refer to the Knowledge Base on the F-Secure Community site for more information.
Trojan:W32/Agent.AFB may drop .DLL , .SYS or .EXE files as its component. It typically drops its components in the following locations on the infected machine:
The dropped .SYS file is a driver that is use to hide some registry entries. This is done by hooking several APIs related to registry operations.