Hibernation hangs; strange event in log

[LPent]

I always use hibernation, never had a problem with it up until today.
When I tried to start the computer, the "Windows is resuming" screen just sits there...indefinitely and the green progress bar at the bottom is extremely slow.

I tried deleting the hiberfil.sys file and re-enabled hibernation, but the same problem keeps occurring. So I started browsing the event logs and I found that every time I hibernated the system today I got an:

The previous system shutdown <at time/date> was unexpected

error.

Which is strange as it was not unexpected for me, I initiated it.
What could be causing this?

 

[SCSIraidGURU]

Do you have something running in the background that could cause hibernation to pause? Have you scanned for Trojan Horses? Try Trendmicro free scan.

 

[LPent]

I had already scanned with Windows defender, spybot and Avast antivir. I did another on-line scan during dinner, but no positives.
There is another thing I just noticed, not sure if it is related. In explorer I suddenly have a Floppy drive listed while there is no physical floppy drive in my pc.
I remember seeing it this afternoon, but it didn't register in my brain until just now that it is new and not right.

Yesterday morning I put the computer into hibernation like always, it worked (as always) yesterday afternoon, but today it hasn't worked one time (and I tried a lot!).
I do not remember installing or changing system settings yesterday (which is not to say that I might have).

 

[SCSIraidGURU]

I would start in the BIOS and check the power settings and then reset them in Vista.

 

[LPent]

I did that last night a few times (I tested the S1/S3 settings in my BIOS) but it didn't work. The last thing I did was reset my BIOS once again, and I was to tired to try it out properly so I put the computer in hibernation and went to bed, this morning it started ok, and according to the logs it ran a backup and a defrag during the night, so the problem seems to have resolved.

Thanks for the help.

 

[roy69]

There was probably a task running in the background that caused this error. Vista has a habit of running task every so often. Go into your task scheduler to see if there is anything factory set in there. This may stop the problem re-occuring.

 

[LPent]

Well, I went through all tasks and logs meticulously, but found nothing that might cause this...however, I did notice that the backup last night ran at 3 o'clock while it is scheduled to run at 1. So maybe it took windows to resume 2 hours from hibernation, in which case it may have been a defrag problem as the defrag ran after the backup and now the problem is gone.