Posted 18 January 2006 - 07:29 PM
Ordinarily when I see that message it means just that -- A different account is still logged on.
For example, if user1 is logged on, then user2 gets on the computer and go to Log Off... Switch User, and logs onto their User2 account, they logged onto their account, while keeping user1's account still open. Or it could be the administrator, or possibly guest account that is still logged in.
If there is a 'hacker' on your computer it's a possibility they may have installed a VNC server on your computer...
Right click on your task bar on the bottom of the screen and choose Task Manager -- go to the processes tab and look for something called WinVNC.exe if you see anything like that then stop the process and note it on here so we can help you further.
My guess is that the first thing I mentioned is your answer.
On a side note, I would go into User Account, and choose to change the way a user logs on/off the computer and turn off fast user switching.
Then go right click on My Computer > Choose: Properties > Choose the Remote tab > Uncheck the box that says "Allow remote assistance..." and "Allow users to connect..."
To be honest, though I don't think there is much for you to worry about.
Enjoy, and good luck.