"No need to use another software in Windows to remote working in other computer with windows" I want to use PC with Window Vista to work on my old PC with Windows XP. 1. On Windows XP PC With Start button , clicking Setting and Control Panel , and then clicking System . Check Allows users to connect remotely to this computer Click on Select Remote Users ( If Users does'nt exist, Add new user with Users Accounts and password - password is important for access with windows vista ) and choose users you want to remote computer Click Ok Configure your Firewall : Click on Security Center Clicking Windows firewall icon Go to Exceptions and check Remote Desktop Go to edit and verify if TCP 3389 is check on. Go to Advanced , clicking first Settings and check Remote Desktop. - Close all windows 2 . On windows Vista - With Start button , clicking All programs and Accessories and Remote Desktop connecti...