Clearing Resolver Cache Using IPCONFIG

Resolver cache stores responses from the DNS server into memory.The IPconfig utility is capable of removing old DNS data in the resolver cache.

IPCONFIG command-line utility used in Windows 2000/XP/2003/Vista/7

Changing the default operating system in Ubuntu

Once you have installed Ubuntu becomes your default operating system. This means the next time you start your computer or laptop, among the choices Grub presents to you, Ubuntu will start on its own unless you specifically scroll down to another operating system, Windows, for instance.