This is not a common virus at all, but we got some questions about it, since F-Secure' F-PROT used to have a false alarm on it. The false alarm was on a program called TBAVKEY.EXE, which was a program to crack the protection of Thunderbyte antivirus utility.
Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.
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See the manual for your F-Secure product on the Help Center.
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