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Hi! what types of errors are logged in the eventvwr? DCOM errors? More information would be good // Joseph

If you realy wanna know whats up with your DC.. Run this tool from Microsoft, it creates a CAB file with a huge amount of logfiles that can show you what might be amiss! http://download.microsoft.com/download/b/b...SRPT_DirSvc.exe You can go thru the dcdiag.txt file to see what's the status of your domain. Also, you can post the files for us to take a look at so we can help you! / Joseph

What does the eventlog say? 1030? 1054? 1097?

If you have 500 000 users and 1000 dcs?.. why dont contact MS directly? With a company at that scale you should have a Permier contract ... Just my two cents

If you take a system state backup you have all vital data from the active directory in one place.

In Internet Explorer?

Not sure if it's the same in SBS as in Win2k3, but you should have a svcpack.log located in %systemroot%. Check that one might give you a clue

To see what acctualy occurs during logon, activate userenv logging. Here you get both time and what happens during the logon. 221833 How to enable user environment debug logging in retail builds of Windows http://support.microsoft.com/default.aspx?...kb;EN-US;221833

Okay, capture the traffic on the network using ethereal from www.ethereal.com You can filter the client IP in ethereal to see what's happening on the wire.. to see if it's a DNS Issue. And you can activate Userenv logging to get a better view of what's going on when the user logs on. 221833 How to enable user environment debug logging in retail builds of Windows http://support.microsoft.com/default.aspx?...kb;EN-US;221833 // Joseph

they might ask for proof of purchase.. otherwise it shouldnt be any problems..

Hi. Try this. HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Setup\7.0 Name: DoNotAllowIE70 Type: REG_DWORD Value: 1 <- Blocks install (0 <- Unblocks)

Windows Update has a function called Catalog services. Its found here -> http://v4.windowsupdate.microsoft.com/catalog/en/ Does it suite your needs?

What's the info in this bluescreen ? and the more info that you provide make it eaiser to solve Cheers

Yes it's possible. What you do is that you open up regedit on another computer. And on the registry menu chose Load Hive, and then load the problematic hive. From there you can access the registry key.

WSUS is only in RC1 as of yet. But it will replace SUS in the future. One way to define the clients to access the sus server is to user group policys. 328010 How to configure automatic updates by using Group Policy or registry http://support.microsoft.com/?id=328010