Open start menu, type CMD, right click on what shows up (should be command prompt) then type powercfg -H off
I have had to do powercfg -H on many times for some reason.
XP is also the same, but open the command prompt through however you do that in XP. I actually forgot because it's been so long since I've used XP.
Start > Control Panel > Performance and Maintenance > Power Options.
You'll find the power saving options here. Check out the Hibernate tab and un-check the tick box.
Uninstall The Toshiba Power Management Utility.