How to know the version of my Windows XP?

There are several Windows XP versions (xp home, pro, media center) and to know the version of your windows XP.

Hold down the WINDOWS key on the keyboard and then press PAUSE/BREAK key.

There will be a pop up window showing the version of your Windows XP

Mac error: YOUR NETWORK SETTINGS HAVE BEEN CHANGED BY ANOTHER APPLICATION

When opening the network control panel in Mac, I get this warning pop up message. 

Solution: 

1.  Click - SYSTEM PREFERENCES
2.  Choose - SECURITY
3.  Check the box - "Require a password to unlock each system preferences pane."

This will prevent that message and changes in the settings.