Internet Explorer 4.x and later versions modify how DNS host entries are cached by decreasing the default time-out value to 30 minutes. More Information. WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system.

This article describes an issue in which a Domain Name System (DNS) server freezes and doesn't respond to DNS requests in Windows Server 2012 R2. A hotfix is available to fix this issue. Before you install this hotfix, see the Prerequisites section.

This advisory describes a Critical Remote Code Execution (RCE) vulnerability that affects Windows servers that are configured to run the DNS Server role. We strongly recommend that server administrators apply the security update at their earliest convenience.

Learn how to update drivers in Windows using Device Manager to update or reinstall a driver.

Fixes an issue in which a Windows Server 2008-based DNS server cannot use a long CNAME or DNAME chain record to resolve the name for all successive DNS name queries. Only the first attempt of a DNS name query is successful.

Consider the following scenario: You configure two DNS servers (one for primary and the other for secondary) that are running Windows Server 2012 R2 or Windows Server 2012. You sign a zone on the primary DNS server and enable the Domain Name System Security Extensions (DNSSEC).

Fixes an issue in which performance keeps decreasing for the DNS Server service in Windows Server 2008 R2 under a heavy load situation.

Microsoft is retiring the Windows legacy inbox Troubleshooters, such as Keyboard troubleshooter and Speech troubleshooter, and the Microsoft Support Diagnostic Tool (MSDT) that runs them.

This article describes problems that occur on a Domain Name System (DNS) server in Windows Server 2012 R2. A hotfix is available to resolve these problems. The hotfix has a prerequisite .

Automatically repair Windows Firewall problems, such as Windows fails to start Windows Firewall service (0x5) or Windows remote assistance is not working.