The trouble is that if he uses the computer especially installing stuff he
will probably over write the disk space the pictures were in and he will be
unable to recover anything.
As usual what you said is ah, probably wrong. If you're trying to
recover deleted files installing another program MAY overwrite the
sectors they were in, but saying it is likely to happen is again based
on ignorance. Something Dennis seems to specialize in showing.
The truth is it is unlikely. The reason is simple. Windows writes to
disk sectors in patterns only it knows meaning it is beyond human
intervention. You can't without considerable knowledge tell Windows
write the file starting at this location.
The second thing you got wrong is the odds of it happening go down if
the drive isn't that full due to simple laws of probability. If you
start with a 200 GB hard drive and it's just 20% full writing a new
application that's probably less than 1GB is very unlikely to get
placed in the same sectors of the files you're attempting to recover.
So while the sectors the deleted files were in may be flagged as
delete the odds of them having been already overwritten is small.
Third you didn't bother to ask what drive the deleted files were on.
If on a different physical drive or even a different partition on the
same drive the odds still are in favor the sectors you want to attempt
to recover not getting overwritten won't be. So again Dennis, I'm
sorry, you simply don't know what you're talking about.
So if the photos are one of a kind, depending on their value to the OP
trying to recover them with one of many restoration applications is a
reasonable gamble. It may not work at least not recover them all, then
again it might work at least to the point recovering some.
As further proof it works, as I mentioned recently years ago I was
playing around with ENCASE a LEA favorite as far as forensic software.
Even on a nearly full drive that was in constant use it easily found
and recovered deleted files that were deleted in excess of a year
before.
So Dennis if you want to continue you're some computer expert routine,
go ahead. Just be aware if I'm in a playful mood I probably will blow
you out of the water.