Fast startup

  1. Scottyboy99's Avatar
    Posts : 2,259
    Windows 10 Pro (64 bit)
       #1

    Fast startup


    I tend to leave windows 10 mostly at default settings. So I keep fast start up enabled on my desktop. I do have an SSD but it is convenient and shaves a few seconds of reboot i guess. However I want to know whether it relies on a power source? What I mean by this is, is my pc although shutdown is always connected to a switched on power source which is actually a UPS. when I switched off the UPS once to move my whole pc setup and re connected everything the next time I booted my pc it went through a full on restart. When I checked reliability history it claimed windows was not properly shutdown. Seemed puzzling. It happened again the other day when i noticed my toddler had been button pressing and switched the ups off. Upon powering the desktop back up windows again relayed message about not being properly shutdown. So I wonder if windows using fast startup still relies on a trickle power source even though it appears to be shutdown

    kind of hard to explain but I hope that made sense
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  2. alphanumeric's Avatar
    Posts : 14,067
    Windows 10 IoT
       #2

    I guess it depends on what state/mode it goes into when you "shut down"? S1, S3 etc? It's a hybrid "sleep" mode right? If it was hibernate, I'd say no, no power required. If it's sleep I think the answer is yes. I don't claim to be an expert on this though. I purposely avoid using fast startup, as I also have an SSD and don't see the point of using it. It can also make it a PITA to access your BIOS on boot up.
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  3. Bree's Avatar
    Posts : 18,617
    10 Home x64 (20H2) (10 Pro on 2nd pc)
       #3

    Scottyboy99 said:
    ...So I wonder if windows using fast startup still relies on a trickle power source even though it appears to be shutdown...
    Fast Startup is a streamlined form of hibernation, all data is saved to the drive then everything is powered down. The command POWERCFG /HIBERNATE OFF in an elevate command prompt will disable fast startup.

    Microsoft said:
    a fast startup simply loads the hibernation file (Hiberfil.sys) into memory to restore the previously saved image of the Windows kernel and loaded drivers.
    https://docs.microsoft.com/en-us/win...om-hibernation
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  4. Scottyboy99's Avatar
    Posts : 2,259
    Windows 10 Pro (64 bit)
    Thread Starter
       #4

    Thank you. I just googled a little bit. Seen a fair few posts where people with laptops see a bit of battery drain on machines with fast start up active even though their laptops are off. So it seems it may rely on a power source which is why if my UPS is switched off for any reason it causes windows to claim an improper shutdown. All seems a little bit unclear though. I will now be putting to some kind of anti child device on the unit in which the pc and ups are housed so things don't get switched off by accident
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  5. alphanumeric's Avatar
    Posts : 14,067
    Windows 10 IoT
       #5

    powercfg -h off is what I run from an admin command prompt.
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  6. Bree's Avatar
    Posts : 18,617
    10 Home x64 (20H2) (10 Pro on 2nd pc)
       #6

    Scottyboy99 said:
    Seen a fair few posts where people with laptops see a bit of battery drain on machines with fast start up active even though their laptops are off.
    Sleep would drain the battery, maybe their laptops went into sleep rather than being shut down. I've removed the battery from my laptop, sometimes even the hard drive. It's never stoped fast startup working when I put it all back together.


    Now if yours was in sleep when the UPS (or the kids) had a 'glitch', then that would be an improper shutdown. Properly shut down you shouldn't see any problems.
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  7. White's Avatar
    Posts : 303
    Microsoft Win 10
       #7

    I want to contribute my humble answer:On desktop computers and connected to the UPS, in occasion of that error, I tell you my experience: I left the desktop computer in half an hour since I did not have to use because I had some cleaning with another computer, I decided to leave it in hibernation mode, since That brought me a problem because the UPS only had the power for 2 hours (fully charged), do not leave it directly to the power outlet, then to turn it on after I went through and finish my maintenance task with another pc. I turned on and that error was remarkable. Error something went wrong, unexpected close (troubleshoot) for the next time I got the care.Now I leave it connected directly to the outlet next to the UPS, either when I decide to use or I run out of electricity now if you need UPS.It happens like everything, unexpected closures after a start appears errors.
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  8. Posts : 281
    Windows 10 Pro 64-bit
       #8

    I also wouldn't use Fast Startup with an SSD. Good lord, don't disable it with a conventional HDD though. Your drive will churn for what's seems like days at startup. Feels like I'm back on Vista. Would love to know why 10 behaves like this.
      My Computers

  9. Scottyboy99's Avatar
    Posts : 2,259
    Windows 10 Pro (64 bit)
    Thread Starter
       #9

    I've turned the option off now. Like mentioned I guess if I have SSD then it's not worth the speed saving, I noticed start up seems more or less the same from cold boot. I don't think it was working as intended anyway, I haven't gained any space on the SSD as a result of turning it off. I thought I'd reclaim space from the hibersys file but I don't think one existed beforehand anyway. I have seen some computers get on better with fast start up than others. I suspect it was putting it into more of a sleep mode. Anyway better off I guess, anything that decreases unnecessary writes to the SSD must be better long term
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  10. cereberus's Avatar
    Posts : 12,010
    Windows10
       #10

    Scottyboy99 said:
    I've turned the option off now. Like mentioned I guess if I have SSD then it's not worth the speed saving, I noticed start up seems more or less the same from cold boot. I don't think it was working as intended anyway, I haven't gained any space on the SSD as a result of turning it off. I thought I'd reclaim space from the hibersys file but I don't think one existed beforehand anyway. I have seen some computers get on better with fast start up than others. I suspect it was putting it into more of a sleep mode. Anyway better off I guess, anything that decreases unnecessary writes to the SSD must be better long term
    On my laptop, have fast startup active also equates to slow shutdown as it has to write more stuff to hibernation file. I just disable hibernation as ssd starts fast enough, and I just use sleep. It takes quite a while to drain battery significantly, but I rarely disconnect from main power.

    On a desktop, you will need some residual power to retain sleep mode, but with ssd restarting is no big deal.

    Of course, always close apps before sleeping even with laptop or desktop with ups.
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