Has to be coincidence don't it?
Old install hibernate worked fine. Fiddled with files for partition reasons and hibernate not listed on shutdown.
Total format and re-install. B

y hibernate is not there. hiberfil.sys can't be found in a search. Raised cmd level "hibernate -h on" does nothing. Reading through, I tried the / slash above and h and +h just for fun.
How's about this. It will hibernate when power button is programed to do the job!!!
Any ideas how to get it back. Thinking about Saab's BIOS comment, but don't want to jigger this temperamental thing while it's going well.
EDIT Odd...it doesn't say hibernating while shutting down from the button. but it does say resuming on restart. 2:45 AM had enough for tonight.
As always, couldn't resist one last thing
Pressed button. Too quick for hibernate - screen goes black straight away.
Cut mains supply for 5 mins. Turn back on at wall.
Fan runs for a second!!
Press start. Menu tells me that windows didn't shut down properly. Mains power must have been keeping things alive till it was cut. Sleep type process. But then Pprune screen was where I left it!
Is this some kind of BIOS only hibernation. It's like a hybrid of that and sleep.
Talking of which.