Grazie per i consigli ho combinato un casino ma va un po' meglio ma trovo sempre virus tra cui uno strano processo su task manager explore.exe
Di seguito il risultato della scansione:
Malwarebytes' Anti-Malware 1.18
Database version: 895

19.39.20 28/06/2008
mbam-log-6-28-2008 (19-39-20).txt

Scan type: Quick Scan
Objects scanned: 48909
Time elapsed: 7 minute(s), 31 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 2
Registry Values Infected: 2
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\gxvpsafm.bxkn (Trojan.FakeAlert) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\gxvpsafm.toolbar.1 (Trojan.FakeAlert) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\ShellServiceObjectDelayLoad\pntqkflv (Trojan.FakeAlert) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\ShellServiceObjectDelayLoad\qegbdmwf (Trojan.FakeAlert) -> Quarantined and deleted successfully.

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

Grazie ancora
Ciao
Marco