I'm using XP Pro and spend a lot of time in cmd.exe running many dos programs -- until recently when I downloaded nero 9 to burn CD's. I have since removed it, but when I go to cmd.exe I can run all of the internal commands like DIR, CD, TYPE, PRINT etc., but when I try to run an external program or batch file that has always worked before nero 9 the response is just a carriage return. No error message and no response to keyboard input. I can only terminate cmd.exe with close-tab and end-now. I would greatly appreciate any help you can provide.

Marvin Good