ASPEN said:
Please advise how one can permanently erase sensitive and
confidential data from PC.Was informed that even formating the hard
disk may not be secured.Please help.
You can't.
There are available a number of software products that overwrite the data
multiple times.This makes the data *much* harder to recover. But it's not
impossible. There are companies that specialize in sophisticated and
expensive data recovery techniques that can often retrieve overwritten data,
even data overwritten multiple times. This is why the US government destroys
drives containing really sensitive data in a furnace.
For most of us, simply deleting the files, or formatting the drive, is good
enough. If you want to be more paranoid, use one of the overwriting programs
I mentioned above. But realize that, short of physical destruction, there's
no such thing as permanent, perfect erasure.