Ninja is the freeware zero-configuration program designed for guarding computers against viruses transmitted by USB pendisks.
This ninja awaits quietly in the system tray for the times whenever a

To keep things simple, ninja is fully portable, self-contained and requires no installation.
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Besides removing known virulent files, this tool will also immunize your pendisk and create a folder called autorun.inf with special protection permissions to protect your pendisk from being infected again when plugged on contaminated computers.
Screenshots
- Waiting for a pendisk to be inserted

- After cleaning a pendisk