Yes when Os is out , it’s too late to apply patches (I just hope at this time that no many users have their pc quite dead)
@Alikhan:as far I’m concerned it was not possible to boot in safemode (with or without network , even last know good config not able anymore)
The only way is to do something like tabvla said : with an other hdd clean (or maybe by DOS command with console windows on cd)