Summary

Product:	F-PROT Antivirus for Windows
Version:	3

Please note that version 6 of F-PROT Antivirus for Windows has been released. We recommend that all Home, Corporate and Mail Server users of version 3 of F-PROT Antivirus for Windows upgrade their program to the newest version as soon as possible.

You receive an "Invalid archive (The virus signature container seems to be corrupted)" error message

This error occurs when the virus signature files that were downloaded are corrupted due to a bad Internet connection, a proxy server, or not enough disk space and so on.

There is a great chance that this is a temporary issue and we urge you to try updating the virus signature files again if this error occurs.

If the problem persists, you may try updating the virus signature files manually. Please do the following:

1. Disable the RealTime Protector prior to deleting the files. This is done by right-clicking on its icon (F-StopW) in the system tray (bottom right hand corner) and selecting to exit. Make sure that you enable it again afterwards, to do so, run the program and press the RealTime Protector button.
2. Now access the "C:\Program Files\FSI\F-PROT" (default location) folder and delete the following files:

Sign.def
Sign2.def
Macro.def

NB: F-PROT Antivirus engine itself will not run after deleting the definition files (Sign.def, Sign2.def, Macro.def). You will probably receive an error like Error:SIGN.DEF not found.

3. Run the Updater. To do this:
1. Click Start and then All Programs.
2. Locate F-PROT Antivirus for Windows and then select Updater.
3. Click the Update button. Then, the virus signature files will be downloaded and installed immediately.

See also:

• Error messages from F-PROT Antivirus Updater

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