Solved Compooter won't go to Sleep :(

I've only just noticed... Since my fresh install of Vista x64, it won't go to sleep anymore. I've tried the Fn shortcut, and clicking Sleep from the Start Menu.

When I try to put it to sleep, the screen fades to black (as usual) then after a while, it pops back on to my logon/unlock screen (I have it set to require a password after resuming). It's as though the computer goes to sleep for no time at all, then wakes up almost instantly.

It might be something to do with the one missing driver that I can't seem to get hold of (Toshiba don't do x64 for my computer :(), the "Firmware Linkage Driver" or something.

Any ideas, anyone?
 

My Computer

System One

  • CPU
    Intel Core 2 Duo @ 2GHz
    Memory
    4GB DDR2 @ 667Mhz
    Graphics Card(s)
    nVidia GeForce Go 7600
    Hard Drives
    1x 160GB 7200rpm 2.5" SATA
Is Hibernation enabled?
 

My Computer

System One

  • CPU
    Intel Core 2 Duo E8400
    Motherboard
    ASUS P5B-E Plus
    Memory
    4GB Kingston ValueRAM DDR2-667
    Graphics Card(s)
    ASUS EN8800GT 512
    Sound Card
    Creative X-Fi XtremeGamer
    Monitor(s) Displays
    Packard Bell Maestro 190W
    Screen Resolution
    1440x900 @ 75Hz
    Hard Drives
    WesternDigital 200GB 7200RPM + Iomega Desktop HD 360GB 7200RPM
    PSU
    Xilence Power 600W Gaming Edition
    Case
    Coolermaster Centurion 534 Black
    Cooling
    Standard Coolermaster Case Fans + Standard Intel CPU Fan.
    Keyboard
    Logitech G15 V1
    Mouse
    Razer Copperhead Tempest Blue
    Internet Speed
    100.0 Mbps
Hibernation is disabled, but it was disbled on my old system, too. Hibernation is different from Sleep mode.

When I enter into sleep mode, the only trace of if in the Event Viewer is the following entry in the 'System' view.

Event ID 59, "The system is entering away mode".
 

My Computer

System One

  • CPU
    Intel Core 2 Duo @ 2GHz
    Memory
    4GB DDR2 @ 667Mhz
    Graphics Card(s)
    nVidia GeForce Go 7600
    Hard Drives
    1x 160GB 7200rpm 2.5" SATA
Update:

After running
Code:
powercfg -DEVICEQUERY wake_armed
it shows that I have no devices that wake the computer.

Running a
Code:
powercfg -lastwake
says that my computer has been woken up 0 times. Therefore, it is not actually reaching the Sleep state.
 

My Computer

System One

  • CPU
    Intel Core 2 Duo @ 2GHz
    Memory
    4GB DDR2 @ 667Mhz
    Graphics Card(s)
    nVidia GeForce Go 7600
    Hard Drives
    1x 160GB 7200rpm 2.5" SATA
Another update, pretty much narrows the problem down:

Code:
The following sleep states are available on this system:
  Standby ( S3 ) Hibernate Hybrid Sleep 
The following sleep states are not available on this system:
Standby (S1)
 The system firmware does not support this standby state.
Standby (S2)
 The system firmware does not support this standby state.
 

My Computer

System One

  • CPU
    Intel Core 2 Duo @ 2GHz
    Memory
    4GB DDR2 @ 667Mhz
    Graphics Card(s)
    nVidia GeForce Go 7600
    Hard Drives
    1x 160GB 7200rpm 2.5" SATA
OK it's fixed!

I feel such a dip. It was under Advanced Power Settings. In the Multimedia section, I had it set up to prevent sleeping when sharing media! With this set to "Allow Sleep", everything sleeps fine.
 

My Computer

System One

  • CPU
    Intel Core 2 Duo @ 2GHz
    Memory
    4GB DDR2 @ 667Mhz
    Graphics Card(s)
    nVidia GeForce Go 7600
    Hard Drives
    1x 160GB 7200rpm 2.5" SATA

My Computers

System One System Two

  • Operating System
    Windows 10 Pro X64 Insider Preview (Skip Ahead) latest build
    Manufacturer/Model
    The Beast Model V (homebrew)
    CPU
    Intel Core i7 965 EE @ 3.6 GHz
    Motherboard
    eVGA X58 Classified 3 (141-GT-E770-A1)
    Memory
    3 * Mushkin 998981 Redline Enhanced triple channel DDR3 4 GB CL7 DDR3 1600 MHz (PC3-12800)
    Graphics Card(s)
    eVGA GeForce GTX 970 SSC ACX 2.0 (04G-P4-3979-KB)
    Sound Card
    Realtek HD Audio (onboard)
    Monitor(s) Displays
    2 * Lenovo LT2323pwA Widescreeen
    Screen Resolution
    2 * 1920 x 1080
    Hard Drives
    SanDisk Ultra SDSSDHII-960G-G25 960 GB SATA III SSD (System)
    Crucial MX100 CT256MX100SSD1 256GB SATA III SSD (User Tree)
    2 * Seagate Barracuda 7200.12 ST31000528AS 1TB 7200 RPM SATA II Mech. HD
    Seagate ST1500DL001-9VT15L Barracuda 7200.12 1.5 TB S
    PSU
    Thermaltake Black Widow TX TR2 850W 80+ Bronze Semi-Mod ATX
    Case
    ThermalTake Level 10 GT (Black)
    Cooling
    Corsair H100 (CPU, dual 140 mm fans on radiator) + Air (2 *
    Keyboard
    Logitech G15 (gen 2)
    Mouse
    Logitech MX Master (shared)
    Internet Speed
    AT&T Lightspeed Gigabit duplex
  • Operating System
    Sabayon Linux (current, weekly updates, 5.1.x kernel)
    Manufacturer/Model
    Lenovo ThinkPad E545
    CPU
    AMD A6-5350M APU
    Motherboard
    Lenovo
    Memory
    8 GB
    Graphics card(s)
    Radeon HD (Embedded)
    Sound Card
    Conextant 20671 SmartAudio HD
    Monitor(s) Displays
    Lenovo 15" Matte
    Screen Resolution
    1680 * 1050
    Hard Drives
    INTEL Cherryvill 520 Series SSDSC2CW180A 180 GB SSD
    PSU
    Lenovo
    Case
    Lenovo
    Cooling
    Lenovo
    Mouse
    Logitech MX Master (shared) | Synaptics TouchPad
    Keyboard
    Lenovo
    Internet Speed
    AT&T LightSpeed Gigabit Duplex
Thanks, but I had just forgotten that I'd changed that setting in my Power Options. I also have a missing driver, so I was slightly worried that it was that causing the problem.

The Tutorials section is pretty good, though - spent a bit of time in their yesterday :P
 

My Computer

System One

  • CPU
    Intel Core 2 Duo @ 2GHz
    Memory
    4GB DDR2 @ 667Mhz
    Graphics Card(s)
    nVidia GeForce Go 7600
    Hard Drives
    1x 160GB 7200rpm 2.5" SATA
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