using windows xp system.when I rename a file ,say a text file, it demands me to put the extension .txt also. otherwise it will warn me that" if you change a file name extension, the file may become unusable". why this warning? earlier on this machine i used to change the filename without any such warning. the warning will come irespective of he file extension(.txt,.mp3,.mp4). can anybody suggest a method to overcome the warning?
Edited by evergreen1, 17 October 2013 - 12:11 PM.