What is fraud

Fraud is defined to be "an intentional perversion of truth" or a "false misrepresentation of a matter of fact" which induces another person to "part with some valuable thing belonging to him or to surrender a legal right".

In addition to the traditional criminal definition of fraud, there are many regulatory laws that have very specific rules that must be complied with. If you do not follow these rules to the letter, you could be charged with and convicted of fraud.

What is lemon law

Is it about Lemon? what you drink. It isn't. Here's the definition.
"Refers to various state laws protecting consumers against the purchase of vehicles found to be persistently defective."

If your car or computer is a lemon, you may be entitled to your money back, a replacement or a cash settlement. So you have nothing to lose, except that Lemon.