Basically spyware is a type of malware that is different from the computer virus in terms of construction and activities. Spywares do not replicate itself or infect other computers that come into contact with an infected computer. Spywares are spread through the freeware and shareware programs that seem to be harmless apparently and when these host programs are installed by the user, the spyware also get installed. In that way the user are not even aware of the spywares as the anti virus software are not capable of spyware detection. To do that you need an adware spyware removal tool that will detect the spyware whenever you try to installed a program with hidden spyware in it.
Spywares pose different threats to your computer. Mostly spywares are created and spread to collect data about the internet behaviour of the users. Spywares store the data of website visits, online purchase and then transfer the data to authors of the spyware for targeted online advertisement. Spywares use the resources of PC to store these data and transfer them. Spywares can cause more serious harm to your privacy. There are spywares that are capable of stealing bank account numbers, credit card numbers and passwords from your PC. As the spywares collect these data by logging the keystrokes when you enter the data at the online forms, you are barely safe when you use secured servers for your online banking or shopping. The confidential information is mostly used by the hackers and crackers for criminal activities that can put you in much trouble. To protect yourself you need spyware remover tools capable of spyware detection.
Along with spyware detection the anti spyware programs are also capable of spyware removal. The programs scan you PC for spywares and remove them to ensure your complete protection.