Need to Recover Large Video File - Recuva Experience?

I accidentally deleted two large video files with a total combined size of about 40 GB that I would really like to get back. I downloaded and ran the file recovery program Recuva, but it was unable to find it. I haven't really worked on the computer since the files were deleted last night, so I'm fairly confident that at least one of them is still perfectly intact. FWIW, I was down to about 17 GB of space remaining on my hard drive before I deleted the videos, and now back up to about 57 GB.

Is there a better program I should try? Am I missing something with Recuva? It seems to me 40 GB is hard to miss. Should I just keep trying different third party recovery apps til I find one that works, or is there something I can do in Vista to get back these videos? Any help would be much appreciated.
 

My Computer

System One

  • Manufacturer/Model
    Dell Inspiron 1525
    CPU
    Intel Premium Dual CPU T2370 @ 1.73GHz
    Memory
    2 GB

richc46

Vista Guru
Gold Member

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Mouse
    Dell USB 4 button optical
    Keyboard
    Dell USB
    Other Info
    DSL provided by ATT
I gave it a shot with Shadow Explorer, and the two largest video files it found are only 512 MB and 450 MB... anything else I can try?
 

My Computer

System One

  • Manufacturer/Model
    Dell Inspiron 1525
    CPU
    Intel Premium Dual CPU T2370 @ 1.73GHz
    Memory
    2 GB

richc46

Vista Guru
Gold Member
Recuva and Shadow Explorer are the best free software that can be used. If you desire to pay, use the computer as little as possible and go to a pay serviceman.
 

My Computer

System One

  • Manufacturer/Model
    Dell XPS420
    Memory
    6 gig
    Graphics Card(s)
    ATI Radeon HD3650 256 MB
    Sound Card
    Intergrated 7.1 Channel Audio
    Monitor(s) Displays
    Dell SP2009W 20 inch Flat Panel w Webcam
    Hard Drives
    640 gb
    Cooling
    Fan
    Mouse
    Dell USB 4 button optical
    Keyboard
    Dell USB
    Other Info
    DSL provided by ATT
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