Because spyware is often included with freeware and shareware, it doesn't hurt to do research on programs before you download them. A simple Google search, a visit to security-related forums, or checking sites devoted to spyware and anti-virus software can alert you to any problems people have reported with software.
Sites to Research Spyware
There are several databases online that track spyware and adware in an effort to give you accurate information about the potential impact they can have on your computer. A few of the better sites are:
You'll find most annoying – yet legitimate – programs on a PC without much effort and with only a basic knowledge of where Windows keeps programs. The truly bad spyware programs make it much more difficult, because they have everything to gain from going undetected.
Your first stop should be the Add/Remove Programs section of your Windows Control Panel (Start Menu/Settings/Control Panel). You should also check the Windows Start-Up Folder (C:Documents and Settings/All Users/Start Menu) to see if any programs have been added. If you are unsure of what a program is, check it against the spyware databases.
You'll also find evidence of spyware infestations in your computer's registry. Only experienced computer users should change the registry, and there are registry editors available that help makes changes when necessary. You can also use registry monitors to keep track of which applications are accessing your computer's registry.