Shake may infect the same program over and over, and infected programs may cause a reboot when executed. The name is derived from a string which is found inside the virus:
Shake well before use !
This message is occasionally displayed when an infected program is run, followed by termination of the program.
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.