-any good recommendation of a Soft to prevent accidentally HD formatting

[ChaosLord]

My solution to this problem back in the olden days was to buy an external Magneto-Optical drive.  Each disk held 540MB and had a hardware write-protect switch on them.  Once you flip the switch, nothing on the drive can be erased.

[ChaosLord]

How easy is it to accidentally format your hard disk, anyway?

When I was working with mentally handicapped ppl I had to lock most of the drives to keep everything from being erased.

Not just from format but they had this way of somehow selecting ALL icons and throwing them in the trash or something.

[ChaosLord]

I would say that they purposely formatted the drive than, as they must have chosen "do you really wish to format" tab.

Mentally ill ppl randomly click things without reading what it says.  Even smart ppl with severe ADD can do that.
Or ppl on drugz.