Some spyware programs can log all your keystrokes. This can be very invasive and compromise your way of life. Such programs may be able to get hold of your secret personal information without you knowing it.
Through a spyware program that records all the letters and number that you punch in your keyboard, email addresses and passwords can be obtained. If you make purchases with your credit card online, this type of spyware program may be able to get your credit card number and other important credit information that may compromise everything.
There are also spyware programs that can force itself into your computer and do its dirty deed. It can scan into your computer hard drives and may make changes in your system. It may change your security settings and allow other malicious programs to come in. this type of spyware program can also prevent you from using certain legitimate programs and instead force you to use another type of software instead.