Windows Vista Update - Screen blank missing text

Hi, i get similar problem, thing is that the screen isn't always blank, i
tried many problem solutions, but nothing works.

windows update service is hanging for about 24 hours, the status is
"stopping" and no action can be used,cause they are blank...
when trying to refresh task sheduler an error ocurs - the task image is
corrupt or has been tampered with user_feed_synchronization.....
and so on, tried many tools, nothing, while instaling "reset windows update
fix it" tool, error ocured - installScript engine is missing from this
machine. if available run ISS cript.msi...
and so on, no idea what to do.
i can't restart PC cause vista fails to launch because of update KB959772
which hanged on the stage 3 of 3 0 percent complete and just keeps shutting
pc down.
i'm tryng to solve this for about 30 hours, nothing works :(
please help!