when i leave my computer for 2 mins. I have to sign back in, i just changed this recently but i was not paying attention to how i made the change.

You mean your computer is locked with in 2 mins and you have to login again? If so change power settings. Please refer below link and change you power settings accordingly http://technet.microsoft.com/en-us/library/dd277426.aspxRegards, Ravikumar P