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All Vista PCs in Office Suddenly Rotten Performance

Very odd one for the Vista experts:

-Large network, 95% Win XP, 5% Vista.
-Yesterday morning we lost power briefly where it went off and then on again real quick.  Server room with all servers and network infrastructure is protected by UPS so nothing went off line there but offices/cubes lost power - so machines went down.
-Windows Vista users are reporting crappy network performance: takes 5 minutes after reboot for the "Welcome" screen to go away; once up, they can access some network resources but not others; internet access is spotty and slow; name resolution is VERY slow; they can't ping the DNS servers even though one of them is also doing DHCP and handing out the addresses; if they ping internal network resources by IP it takes 30 seconds for the machine to even start the ping

Here's the weirdness:
-ALL XP users are fine
-ALL Vista users are reporting the same issues where before the power outage they were all fine
-If there's more than one machine (1 vista, 1 XP) in a cube or office and there's a little desktop switch providing multiple ports, the XP machines run fine while Vista is awful.
-If we launch VMWARE Workstation on the Vista machine and starting up an XP guest, the XP guest performs fine EVEN AS the Vista host performs awful.

What in the world could have caused this and how do I fix it?  It has to be OS specific but I cant imagine what it could be when prior to the power outage all Vista clients were running just fine.

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michaelnatale2008
Asked:
michaelnatale2008
1 Solution
 
David-HowardCommented:
I would love to know if you have pulled any of the Vista machines off of the domain and then put them back on. I cannot tell you how many anomalies of this nature that I have resolved by doing this. If you haven't, you might pick a Vista system, remove it from the domain, reboot and then join the domain again.
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michaelnatale2008Author Commented:
Sorry this was user error on our end.

One of our QA test machines somehow had 5 IP addresses configured for it - 4 of them were our 4 domain controllers for both the domains we have.  Still no idea how this happened (or why only Vista clients seemd to care) but we think the box was powered down prior to the power blip.

No idea how or why the IP config of tha machine was modified - the person responsible is out on vacation.

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