My computer has started going back to the opening screen where you type your password when my computer has been inactive for like two minutes I'm a computer novice putting it nicely I've tried fixing issues with it sleeping but, still having issues help please its driving me nuts!!

What Operating System are you using?

If Windows vista or 7:
Go to control panel and look for and click on Personalization. Now go to screen saver. On this page you should have an option "On resume display logon screen". Remove the check in the box and click OK.

Windows XP:
Go to control panel and look for and click on Display. Now go to screen saver. On this page you should have an option "On resume display logon screen". Remove the check in the box and click OK.