Spyware:

Is a software that secretly gathering personal information from the user's computer without their knowledge. The spyware can usually run in the background gathering information about anything you do on your computer and then uploading that information back to internet server.

The ways that spyware gets into your computer can be the result of installing a new program, usually bundled within "freeware" or "shareware". This way, the developers will get paid from selling gathered information as marketing information to interested parties. Therefore, you don't have to pay for the software. Another common way for spyware to get into your computer is as a software virus.

Adware:

Is an advertising supported software. It is a software that can be downloaded free from the web, but contains banner advertisements that create revenue for the company. Adware is as Spyware, install components on your computer that will send marketing information whenever you are online. Unlike Spyware, Adware contains a disclosure telling you that they will be using your information. It is important to read the privacy policy when downloading any Adware.

Malware:

Malware is slang for malicious software. Malware is software designed specifically to disrupt a computer system. A trojan horse or a virus could be classified as Malware. Some advertising software can be malicious in that it can try to re-install itself after you remove it.
For the purpose of simplicity Malware is software specifically engineered to damage your machine or interrupt the normal computing environment.

Click Here To Clean Your Computer