Re: PSA: Somehow, without action from me, hyberfile.sys got turned on

Maria Sophia wrote on 3/31/2026 2:35 PM:
> This is just a PSA where my circa 2009 desktop works just fine on Windows
> 10 but today, it was out of memory even though I had about 5GB left.
> 
> Huh?
> Where did 5GB of data suddenly go?
>    C:\> wmic logicaldisk get name,freespace,size
>    C:\> vssadmin list shadowstorage
>         
> I checked all the usual suspects (which is a long list I maintain) such as:
>    C:\> dism /online /cleanup-image /analyzecomponentstore
>    Win+R > cleanmgr > Clean Up System Files > OK
>    C:\> del /s /q C:\Windows\Prefetch\*
>    C:\> del %LOCALAPPDATA%\CrashDumps\*
>    etc.
> 
> But it wasn't any of the usual suspects!
> It was hyberfile.sys!
> 
> WTF?
> 
> Sleep is off. Fast startup is off. Everything related to power is off.
> Point being that I haven't turned on hibernation in more than a decade.
>   Q: How the heck did hibernation get turned on without me doing it?
>   A: I don't know the answer.
> 
> But the solution was simple once I saw that hiberfile.sys was the culprit:
>   C:> powercfg /h off
> 
> Note: Obviously I had turned that off years ago, so "something" in the
> recent days turned hiberfile.sys back on. But what? I do not know.
> 

Mary, Microsoft ROBBED you!