Is it possible to schedule client PC's to download updates from a WSUS server at a specific time?

I have a customer who is complaining that when users come in and turn their computers on after updates have been made available for download on the WSUS server that their network is getting bogged down by all of the PC's downloading the updates.

Obviously I know that I can specify the install time but what about the download time?  As far as I know you can only specify the day.  Is it possible to be more specific?

To be clear I am talking about when the client PC's download the updates from the WSUS server.  Not when the server syncs with Microsoft.
edmondcomputerguyAsked:
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snowsurferCommented:
You cant schedule this.  This is controlled randomnly.  The best bet is to leave the machines on at night.  Are you using Group Polocy?
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H_HarryCommented:
Yes it's fairly easy to do.
In the run prompt enter gpedit.msc then go to Computer Configuration > Administrative Templates > Windows Components > Windows Update
In the options on the right of the screen double click on Configure Automatic Updates, this will then open another window, in here click enabled then in the options set the day and time that you want to install the updates.
The hosts will have to be powered on for it to work (obviously) if they are not and they miss the time line, the updates will be installed as soon the the machine is powered on.
You can also do the same via a Group Policy if you don't want to do it locally on each host - the steps are the same but just do it on the domain level and apply it to the relevant OU.
 
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H_HarryCommented:
You can also the the same thing in a non-active directory environment by editing the registry- let me know if this is the case for you and I will outline the steps.
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H_HarryCommented:
Also, as you are using WSUS there is a setting in the same place where you schedule the updates (the 4th one down) that will allow you to put the address of the WSUS server in - obviously make sure this is there and correct.
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edmondcomputerguyAuthor Commented:
The option you are referring to in the group policy only allows you to specify the day to download the updates and the time to install them.  This is already set.  The issue is that I need to specify the day and time to download to download the updates.
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H_HarryCommented:
Sorry missed a bit out - set the 'Automatic Updates detection frequency' setting in the same place as the install schedule in gpedit.msc.
You can set the interval. in hours that the host will use to check for any updates from the configured update server. Obviously you then use the installation time to install all the updates it finds.
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H_HarryCommented:
You also need to have set the 'Specify intranet Microsoft Service Update Location ' setting for the above setting to take effect too.
The defaut period a window host will check for updates is every 22 hours if none of the above is configured.
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edmondcomputerguyAuthor Commented:
How is it that setting the update detection frequency is going to fix the problem?  

Sorry but none of this helps.  I am very familiar with WSUS and Group Policy.  I was hoping that someone might know of a trick or something to specify and specific day and time to download the updates as opposed to just the day.
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H_HarryCommented:
It's just a case of finding a workaround to best suit your needs.
Set the update detection frequency for every 24 hours and implement the GPO at 22:00 - so that at ten O'Clock every night the updates will be pulled down (with a time frame of +/- 4 hours). This will free up the network bandwidth during the day.
Then schedule the install for whenever you feel like.
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Windows Server 2003

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