Seven: l'avvio si blocca dopo il logo e prima del logon

[mirrorx]

Ho un s.o. win 7 Ultimate 64 che da oggi si dopo la schermata con il logo microsoft su schermo nero (prima di caricare la schermata di logon).

Alla fine del bootlog ho queste righe:

Loaded driver \SystemRoot\system32\DRIVERS\mouclass.sys
Loaded driver \SystemRoot\system32\DRIVERS\swenum.sys
Loaded driver \SystemRoot\system32\DRIVERS\umbus.sys
Loaded driver \SystemRoot\system32\DRIVERS\usbhub.sys
Loaded driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Did not load driver \SystemRoot\System32\Drivers\NDProxy.SYS
Loaded driver \SystemRoot\system32\drivers\AtihdW76.sys
Loaded driver \SystemRoot\system32\drivers\ksthunk.sys
Loaded driver \SystemRoot\system32\drivers\viahduaa.sys
Loaded driver \SystemRoot\system32\DRIVERS\hidusb.sys
Loaded driver \SystemRoot\system32\DRIVERS\mouhid.sys
Loaded driver \SystemRoot\system32\DRIVERS\usbccgp.sys
Loaded driver \SystemRoot\system32\DRIVERS\usbser.sys
Loaded driver \SystemRoot\system32\DRIVERS\onda_mx83xup_ppo.sys
Loaded driver \SystemRoot\system32\drivers\modem.sys
Loaded driver \SystemRoot\system32\DRIVERS\USBSTOR.SYS
Loaded driver \SystemRoot\system32\DRIVERS\monitor.sys

L'ultima riga è il monitor.sys

Non capisco che problema possa dare...