i change by mistake the program , i did when i was inside the my antivirus (norton) i choose to use notepad now all same files are opened the same way, is any way what i can correct this problem, i don,t have system restore point, and i am using window xp professional version 2002 service pack 3.the norton is working but i dont have acces to page to run the live update o the scan, but all file . dat are open like that I need any help please!!!!!