See link

Here is a link that might be useful: vista-sleep-mode

I've made desktop shortcuts for hibernate and sleep. (i'm lazy and forgetfull)
Sleep maybe can be tricky - not all computers do a regular sleep.

For Vista, Win7 is probably the same !
forget xp, open cmd prompt and shutdown -?

Right click desktop , new... shortcut...

hibernate command;
shutdown /h

sleep command;
C:\Windows\System32\rundll32.exe Powrprof.dll,SetSuspendState Sleep

Ithink I didn't explain myself very well I somehow have lost all hibernate and sleep funtion on this computer and years back there a way of just useing the key letters etc. to instanly put the computer into hibernate otherwise my computer runs all day not good I just want to be able to
put it in one of these modes with the keys thank you to the 2 people who tried to help mabe there is another solution

what version of windows are you using?

How to use Keyboard Shortcuts to shutdown, hibernate, sleep or restart vista

Take a Shortcut to Hibernation

Top Techniques for Putting Windows on Hold

maybe some of those options will work. if not please let us know your OS version

I am useing vista home version sure appreciate the help so far but nothing is working Iam not very smart on this thing and I am a older person, if there is anything I miss is that feature.

Hibernate sometimes gets turned off in Vista by some clean up programs.

If hibernate is turned off on the shut down menu, you will need to re-enable it. If you don't it will never work with any keystrokes.

If you know how to open a black administrator cmd window, you can enable it by typing in;
powercfg -h on

Some laptops have special key presses to enter sleep and hibernate...
Is this a laptop ? If so what is the make and model. Maybe someone will find and read your manual.