Most popular tip seem to be to run powercfg /hibernate on from cmd (run as Admin). But this did n’t work for me.
However turning off the Hybrid mode worked.
Personalize -> Screen Saver -> Changer Power Settings -> Change when the computer sleeps -> Change advanced power settings -> Sleep ->Allow hytbrid sleep -> Settings [Off] .
Now did anyone say Vista was user friendly ?
Here is a blog with screen shots.
