Rogue anti spyware software. Avoid having any of these on your computer(7)

Locking various aspects of the system
To prevent removal by the user and entice the user to buy the program, rogue software will often lock various aspects of the system, including the control panel, the Add/Remove Programs feature, the ability to change the desktop, the ability to change the home page, and the ability to go to certain malware removal sites. These are all intended to prevent the user from removing the program and instead try to force them to buy the "full" version.
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