A guy rings tech support to report that his computer is faulty. Tech: What's the problem? User: There is smoke coming out of the power supply. Tech: You'll need a new power supply. User: No, I don't! I just need to change the startup files. Tech: Sir, the power supply is faulty. You'll need to replace it. User: No way! Someone told me that I just needed to change the startup files and it will fix the problem! All I need is for you to tell me the command. Ten minutes later, the User is still adamant that they are right. The tech is frustrated and fed up. Tech: Sorry, Sir. We don't normally tell our customers this, but there is an undocumented DOS command that will fix the problem. User: I knew it! Tech: Just add the line LOAD NOSMOKE.COM at the end of the CONFIG.SYS. Let me know how it goes. Ten minutes later. User: It didn't work. The power supply is still smoking. Tech: Well, what version of DOS are you using? User: MS-DOS 6.22. Tech: 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. One hour later. User: I need a new power supply. Tech: How did you come to that conclusion? User: Well, I rang Microsoft and told him about what you said, and he started asking questions about the make of power supply. Tech: Then what did he say? User: He told me that my power supply isn't compatible with NOSMOKE