>From an ex-field sales/support survivor: 
I used to work in a computer store and one day we had a gentleman call in 
with a smoking power supply. The service representative was having a bit 
of trouble convincing this guy that he had a hardware problem.

Service Rep: Sir, something has burned within your power supply. 
Customer: I bet that there is some command that I can put into the 
AUTOEXEC.BAT file that will take care of this.

Service Rep: There is nothing that software can do to help you with 
this problem.

Customer: I know that there is something I can put in... some 
command... maybe it should go into the CONFIG.SYS.

[After a few minutes of going round and round] 
Service Rep: Okay, I am not supposed to tell anyone this but there is a 
hidden command in some versions of DOS that you can use. I want you to 
edit your AUTOEXEC.BAT and add the last line as C:\DOS\NOSMOKE and reboot 
your computer.

[Customer does this]

Customer: It is still smoking.

Service Rep: I guess you'll need to call Microsoft and ask them for a 
patch for the NOSMOKE.EXE.

[The customer then hung up. We thought that we had heard the last of 
this guy. But NO; he calls back four hours later!]

Service Rep: Hello, Sir, how is your computer? 
Customer: I called Microsoft and they said that my power supply is 
incompatible with their NOSMOKE.EXE and that I need to get a new one. I 
was wondering when I can have that done and how much it will cost....