Tech Support:"What's the problem?"

Customer:"There is smoke coming out of the power supply."

Tech Support:"You'll need a new power supply."

Customer:"No I don't! I just need to change the startup files."

Tech Support:"Sir, the power supply is faulty. You'll need to replace it."

Customer:"No way! Someone told me that I just needed to change the startup and it will fix the problem! All I need is for you to tell me the command."

10 minutes later, the Customer is still adamant that they are right. The Tech Support is frustrated and fed up.

Tech Support:"Sorry, Sir. We don't normally tell our customers this, but there is an undocumented DOS command that will fix the problem."

Customer:"I knew it!"

Tech Support:"Just add the line LOAD NOSMOKE.COM at the end of the CONFIG.SYS. Let me know how it goes."

10 minutes later.

Customer:"It didn't work. The power supply is still smoking."

Tech Support:"Well, what version of DOS are you using?"

Customer:"MS-DOS 6.22"

Tech Support:"That's your problem there. That version of DOS didn't come with NOSMOKE. Contact Microsoft and ask them for a patch that will give you the file. Let me know how it goes."

1 hour later.

Customer:"I need a new power supply."

Tech Support:"How did you come to that conclusion?"

Customer:"Well, I rang Microsoft and told him all about what you said, and he started asking questions about the make of power supply."

Tech Support:"Then what did he say?"

Customer:"He told me that my power supply isn't compatible with NOSMOKE."