xp?? Earlier i used to open the dos command prompt using the run program by typing "cmd". but now when i type this it doesn't show anything actually nothing happens.I have even tried to run "C:WINDOWSsystem32cmd.exe"but still i am unable to create a shortcut of it on my desktop.I even tried to search out the file cmd.exe and i even found it but when i double clicked on it to open the command prompt nothing happened as usual.I am totally clueless.how do i open the prompt??help me!!!!!!