How to Remove and Prevent Spyware, Trojans and Adware from PC?
Spyware , Trojans , Adware are unwanted software that is installed while surfing the Internet, and that typically uses the Internet in the process of exploiting the user and the user's machine.

Spyware's Symptoms:
Spyware, trojans and adware contact other computers, and each of them is program of its own, therefore they use system resources such as CPU cycles, memory and an Internet connection.

Slower Computer Speed:
There are several reasons your computer may be running slow, but if you use it on a regular basis, then you are familiar with their normal speed. Older computers tend to run slower. Some applications cause computers to run slower. Computers are machines, they do not have moods. A sudden change in how your computer is running could be a sign of spyware or adware.

E-Mail Symptoms:
If you're getting a lot of bounced back mail and see evidence of e-mails being sent without your knowledge, then it's possible that trojan spamware has found its way onto your computer. Spamware is a trojan that can turn your computer into a spam launching pad and create headaches for unknowing computer users, especially if a virus is sent. Even if your computer is not being used to send spam, trojans can steal a copy of your e-mail address book and send it back to a spammer.

Pop-Up Advertisements:
If the following signs are present, it might be an indication that you are infected with Adware or spyware.

- Ads pop-up on your desktop or over offline applications such as a word processor

- Ads pop-up when you visited a Web site or open a new Web page.

- Pop-ups appear after you visited hacker sites or pornographic sites.

- The pop-up ads are targeting on terms you have searched recently.

Removal of Spyware , Trojans and Adware :
One of the first things you should do if you find a trojan or spyware on your computer is disconnect it from the Internet. It is probably not enough to just close a browser session; you should pull the phone line out of the wall or disconnect the modem so your computer is not connected to any network.

Spyware and Adware Scanning Software:
The easiest way to find and remove spyware and adware is with scanning software. Anti-spyware software works in much the same way as anti-virus software. It scans your computer's hard drive and looks for files associated with known spyware and adware programs. After the scan, the software usually displays or quarantines potential problems and allows users to decide what should be removed.

Other Removal Options:
You can always check the Add/Remove Programs section of Windows to see if any adware or spyware is listed. Some of the quasi-legitimate adware programs may include uninstallers, but malicious pests do not.

Blocking Pop-Up Ads:
One way to avoid the potential danger lurking behind pop-up ads is to install software that blocks them. The Google Toolbar blocks pop-up ads. There are numerous programs that block pop-ups. Before installing them, research the developer and the company to make sure they are legitimate.