Do you connect to several different machines in your workgroup and are required to enter a username and password every time you log on to the remote computer? Or are you running a Windows XP Home edition on a Domain network? Microsoft has included a little known tool on all editions of it's XP Operating System (I say little known, because I've only now just discovered it.) called "Store User Names and Passwords". It's a perfect way to secure your home computer network without the hassle of entering another password. To start the program click on Start > Run and type rundll32.exe keymgr.dll, KRShowKeyMgr into the Open field.
When it opens up, click Add. In the new window type in the information pertaining to the computer you want to connect to. If you are connecting to a domain just type an asterisk for the computer name followed by the domain name. ie. *.domain.com
For full details on this tool check out Microsoft's website: