We have recently upgraded to Windows Server 2008 R2 and now, at randomintervals DNS stops working. After lots of trawling the web, it appears that theproblem is experienced by almost everyone – and is caused by Microsoft's “E”DNS. The only way to get DNS working again is then to re-start the DNS service –something that is a complete pain, not to mention time-consuming!Thankfully we have found a simple fix:Open command promptType: dnscmd /config /EnableEDNSProbes 0press Enter. Sorted.