I see this Disk Immunity feature in Windows 7 Manager v2.02, which can be found in Repair Center utility.
Disk Immunity function to provide immunity against the virus on the disk (especially flash drive) that runs (spread) by using the autorun feature (autorun.inf).
After “Immunize” the disk, this utility will protect the autorun.inf file so it can not be replaced with the same file that are owned by the virus.
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