Recently my Fujitsu Siemens Xa 1526 laptop has developed a problem on Vista Ultimate 64 that when it resumes from hibernation / sleep the USB ports have been totally disabled and I am unable to use them.

windows vista will not hibernate | Tech Support Apr 16, 2009 Change the Windows 7 or Vista Power Buttons to Shut Down Oct 18, 2009 Hibernation (computing) - Wikipedia

Jun 13, 2020

Like Windows XP, you can put Windows Vista in hibernate mode too. When you hibernate Windows Vista, your computer saves all contents of the RAM in a file called hiberfil.sys in the root folder of the system partition. This file is same in size as the size of the RAM memory you have in your system.

Power Options - Add or Remove "Hibernate after" | Windows

screen brightness stuck after sleep/hibernate in windows