so wht is this can u tell me?

adware - software that is supported by displaying ads somewhere visible on the screen while the program is running.

spyware - software that is installed on the system either with or without the user's knowledge that watches what the user is doing. Monitors what websites they surf to, etc. It then reports this information back to a central location where it is processed and can be used for more directed spam.

kazaa - a napster style network that is, I believe on its way out.

Anything else you want to know?