Sometimes your described "wished context" works, otherwise it doesn't. Why ? Because of BIOS bugs, unsigned / buggy drivers, etc. Check your BIOS version and find out if there is a new version at your PC's manufacturer site.
Trying to unweave, unwind, unravel
And piece together the past and the future,
T. S. Eliot
This is probably a common problem, and maybe I'm being picky - but my computer has recently (in the last week) been sporadic about going to standby automatically. I can leave the computer for hours (standy time is set to 20 minutes) and come back to the see the screensaver still on. When it does go to standby, it normally takes longer than the 20 minutes the power settings are put to. I haven't installed anything new and have scanned for viruses. Any suggestions - or is this normal?