Fairz is an encrypted virus that infects COM and EXE files when they are accessed. It has code to display the following message when a specific file is executed:
This is an [ illegal copy ] of KeyPress virus remover System Halted
Occasionally Fairz will corrupt files while infecting them. Data Fellows anti-virus products will detect such files as "Damaged Fairz-infected file". Such files will be deleted as they cannot be disinfected.
The virus also contains this text: "Eternal Fairz". These texts are not visible when the virus is examined.
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.