How much RAM do you have? (Not that memory issues are ALWAYS related to how much RAM you have--they can be related to how much memory is allocated for various functions--but it's a good placed to start with knowing how much RAM your computer has. Joan In a message dated 12/13/2010 6:29:22 P.M. Eastern Standard Time, [email protected] writes: I sent this some days ago, but I got unsubscribed during the AOL block. Hope it will go through this time. How does one tell when the computer needs more memory? I get messages to that effect as well as ones telling me my computer has been locked and I cannot get on unless I am administrator, which I am. Also, my mouse works sometimes and not others. I do not know what is wrong. I think it is probably some dumb thing I have done or something I have put on the computer which I should not have. I have a Dell Dimension 2400, Win XP, and have Comodo, Avira, Spybot S&D, and Spyware Blaster. All of them come up clean. Any help/ideas appreciated.