A new UPX packed variant of MyDoom worm - Mydoom.O, also detected as Mydoom.Q has been found on August 3rd, 2004. For more details, please see Mydoom.Q.
Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.
More information on 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.