How to clear the DNS cache?

On certain occasions, when we enter a website through the browser, there is a cache of the dns's route and this can cause problems with:

MX change
Change in design or programming of web content
Change of servers
Change of supplier
Changes from individual plans to resellers
Changes from another provider to www.copernico.net

There is a quick solution to clear the cache of our router, modem or browser with these steps (only for windows):

1) Enter the start menu, and in run put "cmd" (without quotes) and enter. A DOS window will appear, but you can also open it from "All Programs", "Accessories", "Command Prompt" which is the same.

2) Once there, execute this list of commands, do them in the order they appear, it doesn't matter if they are repeated:
Code:

ipconfig /flushdns
ipconfig /release
ipconfig /flushdns
ipconfig /renew

3) Once they renew, their IP address will be updated and they will be able to browse their website normally with the new IP or from the new provider (whether they have a dynamic IP or not, if they have a static IP or dhcp from a router , some steps above may throw error, ignore them).