DNS Problems with VistaIn Feburary 2016 11,

In Feburary 2016 11,
DNS problems frequently originate in the cache. Over time, the DNS cache can become corrupted causing issues with the DNS in Vista. In order to clear the cache and thus resolve the problems, a command prompt must be launched as an Administrator. Once the command prompt loads, simply type 'ipconfig /flushdns' to clear the DNS cache.
No Connection Without Router Reboot
Many Windows Vista users report DNS problems initially establishing a DHCP (Dynamic Host Configuration Protocol) connection with their router. A workaround to this issue is to simply manually reboot the router to which the Windows Vista machine is attempting to connect. This clears the DNS addresses and submits a new address to the computer. If it is a desktop computer, another solution is to manually input the DNS addresses that the computer will use.
Conflicts with Wireless Card or Ethernet Controller Checksum Offload
Windows Vista is not compatible with some features that are bundled with popular wireless cards and Ethernet controllers. In particular, checksum offload features can cause problems when Vista attempts to renew a DNS address once connected to the Internet. To resolve these issues, simply disable the checksum offload feature.
Firmware Problems
Many Vista DNS problems can be solved by simply updating the firmware of the router. The firmware is the software that operates on the router. If an old version of the firmware is currently installed, this will cause problems with Windows Vista. Windows Vista utilizes an improved TCP/IP (Transmission Control Protocol/Internet Protocol) stack procedure that calls DNS addresses in a different manner than Windows XP. These updates to the TCP/IP stack procedure necessitate having the latest router firmware installed.
Conflicts with LAN Connection
If Windows Vista is used to connect to the Internet via both a wired LAN connection and a Wi-Fi wireless connection, it is possible that the wired LAN connection could create problems when attempting to attain a DNS address through a Wi-Fi wireless connection. This problem arises because the wired LAN connection, even when disconnected, is assigned an IP address if it has been used in the past. This presents difficulties when Vista attempts to connect to the Internet on a wireless connection since it prefers the faster, wired connection. To solve this, simply disable the LAN connection when using the computer in a wireless setting.
In Feburary 2016 11,