How did you determine that the hibernate function is disabled? Have you checked the bios settings? I disabled hibernate in windows 7 to save disk space, and can still use sleep mode when powering down.
When I look into the bios , it only references PCMI or whatever and doesnt seem to offer standby and hibernate. I am using windows XP pro and do not run any gaming , strictly internet and email . Many inquiries out there suggest that there is no fix - and of course MS wont support Xp any more. Appreciate any help