Commodo Antivirus, Manually update virus definition

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For respective CIS version, we have different complete bases.cav:

1. For CIS 4.x
Following link points to latest complete bases.cav always
http://download.Comodo.com/av/updates40/sigs/bases/bases.cav

2. For CIS 5.0
Following link points to latest complete bases.cav always
http://download.Comodo.com/av/updates50/sigs/bases/bases.cav

3. For CIS 5.3 & 5.4
i) Download
http://download.Comodo.com/av/updates51/sigs/bases/bases.cav.z
ii)
Use 7-zip from http://www.7-zip.org/download.html , or your archiver program of choice that can handle 7z archives and unpack it. After unpacking you will have to rename the file to bases.cav.

4. For CIS 5.5
i) Download
http://download.Comodo.com/av/updates55/sigs/bases/bases.cav.z
ii)
Use 7-zip from http://www.7-zip.org/download.html , or your archiver program of choice that can handle 7z archives and unpack it. After unpacking you will have to rename the file to bases.cav.

5. For CIS 5.8
i) Download
http://download.Comodo.com/av/updates58/sigs/bases/bases.cav.z
ii)
Use 7-zip from http://www.7-zip.org/download.html , or your archiver program of choice that can handle 7z archives and unpack it. After unpacking you will have to rename the file to bases.cav.

Activating the download:

1. Save the downloaded file on your computer

2. Reboot in Safe-Mode

3. Open explorer and go to C:\Program files\Comodo\Comodo internet security\scanners and copy the downloaded bases.cav here

4. Reboot your system in normal mode