There are some threats that impersonate legitimate programs, modify browsers or the boot screen graphics, and even redirect traffic. Our standard scanners necessarily have a delicate Balance Between effective malware detection and removal and erroneously removing legitimate files. Sometimes, these "scareware" programs can require special Tactics to remove them. With the Norton Power Eraser tool, these threats (and others) are specifically targeted, and thus are effectively detected and removed. You should use the Norton Power Eraser tool when nothing else will remove an annoying program and you are willing to accept a higher risk that the scanner may quarantine a legitimate program.Norton Internet Security and Norton AntiVirus 2011 products are currently under public beta. More information about Norton Power Eraser to be added here shortly.