Ok guys i have done something stupid.I am running windows xp and i am playing with trojans and i changed a registry key and now all files with the .exe extension wont open a picture of the error is attached.The folder i edited was HKEY_CLASSES_ROOT\exefile\shell\open\command and changed the default tag to: ""%1" %*"nd Notepad wont open but previous text files on my desktop will open and i can modify that and change it into a .reg file.Whats the registry commands to change it back to default?.

Thank you i know people may think im stupid but im a newbie and im trying to learn more bout my system.

ps the place i got this command was off symantec virus report and i was trying to get a trojan to start the same way could someone also explain if its symantec who got the command wrong or me the virus report is attached below