Nevermind,my bad about that 'alone' thing.My mom's friend installed Windows for me,and before reinstallation I had MSE,and now it seems like every AV I try to install has some kind of error.I think that those two (update error and AV error) are connected and I think that it has something to do...
So basicly,I can't do anything alone?Also I tryed installing Avast and Norton AV but they both failed,error 0x00000005 showed up for Avast.I think it's the same kind of error as the one for the updates.
I reinstalled Windows 7,and everything was fine until I tryed updating it.Every time after installing and restarting it says "Failure configuring Windows updates. Reverting changes. Do not turn off your computer" and when I click on the details it's the "0x80070005" error (ERROR_ACCESS_DENIED...