Quote:
The Weak Squad at Best Buy "made a mistake" and did a Systems Restore on my laptop, which had a Trojan Venudo virus. I asked for a Systems Service. They made NO back-up disk for me, of course.
Since this was their "mistake" they said they are going to use some kind of forensic program "like the FBI uses" to TRY to recover my data.
My question is, does this sound feasible? And when I pick it up, is there something specific I should ask re: what was done?
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Unfortunately, that is the "technique" used by most shops that present themselves as "professional" people so The Geek Squad is run-of-the-mill in that respect. What they did "to" you (as opposed to "for" you) is done based on an assumption that you have a full and up-to-the-minute backup of everything on your system, knowing all the time that literally over 99% of the people don't have any such thing.
Also, over 99% of the time, they don't even attempt to explain that to the customer in meaningful terms.
As for recovery of your data, here's how that goes: When a drive is formatted/repartitioned or, in general, the data cleared from the disk, it is all still there. Every file stored on the disk has a beginning-of-file marker and an end-of-file marker. When the drive is formatted, repartitioned, etc., those beginning-of-file and end-of-file markers are simply removed and the millions or even billions of ones and zeroes that are the bits that make up the Bytes that represent those characters that make up those files are still just exactly all where they always were (and very importantly)
until they are overwritten by new files/data.
There is software that can "figure out" where the beginning- and end-of-file markers were and restore them because even those markers, themselves, are partly there, enough so that even you or I could recognize them with a disk reader. Example: an end-of-file marker may look like
<EOF>. An erased end-of-file marker might look like
<EOF. This is an oversimplification; but, it does give you an analogy you can understand. These markers envelope the file so that the OS knows what it is, where it is and where it begins and ends.
It's sort of like a postal worker finding a piece of paper on the sorting room floor. The paper begins with "Dear Mr. Brown", ends with "Sincerely, Mary Jones" and has a lot of writing on each page. It is obvious to the postal worker this is lost mail; but, without the envelope that encloses it and the address on its front and a stamp, that is, unfortunately, all he can know.
So the "FBI software" goes through the "post office" and finds all that mail that has no envelopes and turns it over to the "postmaster" (you).
Now, back to the part that says
until they are overwritten: When the new operating system is written to the disk, it writes data to portions of the disk that may or may not have contained data before. It is very possible that many of the files that are important to you are in space that has not
yet been reused, with emphasis on
yet. Every second your computer runs its OS, even if you are doing absolutely nothing with it, yourself, the OS is writing and erasing data to and from the hard disk
continuously.
Turn off the computer right now and do not turn it on again until after recovery is finished.
Here's the procedure: The hard disk should be physically removed from the computer and connected to a machine that has the recovery software preinstalled. The data will be recovered from the subject disk without writing anything to the subject disk and that data is written to another disk as it is recovered.
Recovery software should NEVER be installed on the hard disk where the to-be-recovered data exists. NOTHING should be installed there. The disk should BE REMOVED and recovery done on ANOTHER SYSTEM already set up for that purpose.
If you find the "tech" intends to install recovery software onto your system, take your computer and run; you are in the presence of dangerous idiots, which, in the case of The Geek Squad, would be the expected as opposed to the exception.