Intermittent dns failure windows 7

Office Office Exchange Server. Not an IT pro? Windows Client. Sign in. United States English. Ask a question. Quick access. Search related threads. Remove From My Forums. Answered by:. Archived Forums. Baxter 0. Sign in to vote. Hello All, I've been fighting this virtual machine networking problem for over a week now.

I've tried to anticipate the questions you might ask so here is some additional information: The computer is a Lenovo W laptop running Windows 7 Ultimate, bit.

Baxter Monday, May 17, PM. Saturday, May 15, AM. I should have tested this first. Faulting application name: lsass. So there wininit. I also have another feedback on Facebook that update KB on Windows Server is causing the restart of the AD controllers the AD controller is restarted every 15 minutes.

Boot-Loop on Windows Server On reddit. See also the links below. The error message is that the hypervisor is not running: Hypervisor launch failed; The operating systems boot loader failed with error 0xCBB. This is probably update KB for Server R2 — just as a hint, if there should be problems under Windows Server — Many thanks for this.

We were hours trying to resolve this as our HyperV virtual servers wouldn't start. Eventually came across your site, uninstalled update, rebooted and it now works fine.

I wouldn't have worked this out to be honest if it wasn't for your site. Echoing this comment — same behavior, same fix. Thank you very much for this thread! Rollback worked and I avoided a coronary episode. Thank you. Not sure if it's the solution, but I added the registry key below and the server hasn't rebooted for 40 minutes now. FYI — That key was introduced with a November patch for kerberos security.

A later patch will enforce it and key won't do anything. But that was planned for the summer, hopefully MSFT has an actual fix by then. I have 2 DC with r2, the updates did fail during install, so there is nothing to remove.. But still got loops. Need te restore them from backups.. I was desperately searching for hints this morning and couldn't find much until I stumbled upon your post.

Thank you! One tip that helped me is that I could catch the DC before a reboot was triggered about 2 minutes after startup and then stop the Netlogon service. That stopped the rebooting such that I could troubleshoot and uninstall the update. Thanks again! Dave, the net stop netlogon tip saved our bacon.

Leave it to Microsoft to release a zero-day DC boot loop to their own customers. We had similar issue this morning with Windows Server DC not R2 that kept going in reboot loop every few minutes of showing the signon screen of Windows. It is a VM running on vmware. We booted the VM to safe mode by pressing F8 before Windows started and removed all last night updates and rebooted.

Seems to have fixed the issue. We have changed the server to not install Windows updates automatically to avoid such issues in the future. Does anyone have a comprehensive list of KB's for all server versions that are causing this issue? Blame all Server updates from R2 up to — see also the linked articles at the end of my text. Our W2k12 DC was updated on Wed, am. If it takes longer than a second to respond, either due to an OS or networking issue, then the client can fail over to the second DNS server.

Windows 7 does not honor DNS server order. Windows does not always honor DNS order. You can try typing nslookup without an address afterwards from the command prompt and it will show you which server it is looking at.

Keep in mind that nslookup doesn't tell you which DNS server the OS is trying to use, just what it is trying to use. The OS could be using the secondary server while nslookup is using the primary. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks. This does not effect external addresses our clients are set up with a secondary external public DNS Complaints don't seem to come all at once, suggesting the DNS fails for some clients, yet works for others, during the same time period.

Any ideas what could be causing the issue? Microsoft Corporation Windows Server R2 Best Answer. View this "Best Answer" in the replies below ». Popular Topics in DNS. Spiceworks Help Desk.