Hi. I have just installed Safari update from my main admin account, restarted it. And since, the log in window appears as usual. I enter the password the blue window appears for about the minute, and the log in window re-appears. Out of 3 accounts can log in into just one. I have changed settings, to no password, it still wont log in. Created new account, it logs in to new account. On system preferences when go on software update it says that error occured and it can't open. ANy ideas what's the problem? The worst bit, i have loads of work to do and just two hours left.