Chiedo scusa se posto solo adesso, ma questo problema era passato in secondo piano.
Ecco il rapporto di navilog

Search Navipromo version 3.6.6 began on 09/11/2008 at 15:19:46,34

!!! Warning, this report may include legitimate files/programs !!!
!!! Post this report on the forum you are being helped !!!
!!! Don't continue with removal unless instructed by an authorized helper !!!
Fix running from C:\Programmi\navilog1
Actual User Account : "Fabrizio Colombo"

Updated on 29.09.2008 at 17h30 by IL-MAFIOSO


Microsoft Windows XP [Versione 5.1.2600]
Version Internet Explorer : 6.0.2900.2180
Filesystem type : FAT32

Search done in normal mode

*** Searching for installed Software ***

Favorit

*** Search folders in "C:\WINDOWS" ***


*** Search folders in "C:\Programmi" ***

...\InternetGameBox found !

*** Search folders in "C:\Documents and Settings\All Users\menuav~1

\progra~1" ***

...\InternetGameBox found !

*** Search folders in "C:\Documents and Settings\All Users\menuav~1" ***


*** Search folders in "c:\docume~1\alluse~1\datiap~1" ***


*** Search folders in "C:\Documents and Settings\Fabrizio

Colombo\datiap~1" ***


*** Search folders in "C:\Documents and Settings\Fabrizio

Colombo\impost~1\datiap~1" ***


*** Search folders in "C:\Documents and Settings\Fabrizio

Colombo\menuav~1\progra~1" ***


*** Search with Catchme-rootkit/stealth malware detector by gmer ***
for more info : http://www.gmer.net



*** Search with GenericNaviSearch ***
!!! Possibility of legitimate files in the result !!!
!!! Must always be checked before manually deleting !!!

* Scan in "C:\WINDOWS\system32" *

* Scan in "C:\Documents and Settings\Fabrizio Colombo\impost~1\datiap~1"

*

Files found :

ssoaico.exe found !
ssoaico.dat found !
ssoaico_nav.dat found !
ssoaico_navps.dat found !



*** Search files ***



*** Search specific Registry keys ***


*** Complementary Search ***
(Search specific files)

1)Search new Instant Access files :


2)Heuristic Search :

* In "C:\WINDOWS\system32" :


* In "C:\Documents and Settings\Fabrizio Colombo\impost~1\datiap~1" :

ssoaico.dat found !
ssoaico.exe found !
ssoaico_nav.dat found !
ssoaico_navps.dat found !

3)Certificates Search :

Egroup certificate found !
Electronic-Group certificate found !
Montorgueil certificate not found !
OOO-Favorit certificate found !
Sunny-Day-Design-Ltd certificate not found !

4)Search known files :



*** Search completed on 09/11/2008 at 15:23:33,92 ***