In group policy sleep settings, what is the difference between unattended sleep time and system sleep timeout

I've read the descriptions but can't make out a defining difference between the two and when to use one but not the other.

Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Muhammad BurhanManager I.T.Commented:
The difference is if the unattended time is 10 mins so Windows automatically transitions to sleep when the user leaves the computer unattended. If you specify 0 seconds, Windows will not transition to sleep automatically whether any process is running in background or not.
And in typical sleep timeout is for system idle condition, it depends on the processes.
leo135Author Commented:
Thanks for your answer.

I still don't understand:
If I set 'system sleep timeout', why do I need the 'unattended sleep timeout'?
Muhammad BurhanManager I.T.Commented:
A 50GB folder is going to copy from D drive to E drive with no other interrupt (any input) from keyboard or mouse.

Case1: System Sleep Timeout (10 mins)
the background 'copying' process tells the system to don't go to sleep until that finished.

Case2: Unattended Sleep Timeout (10 mins)
system will go to sleep if you don't push interrupt (any input form mouse/keyboard)
that 'copying' process is not considered as the condition in this case.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Windows Server 2008

From novice to tech pro — start learning today.