Getiing angry because your new wifi connection is not responding, well there is a very greate thing that you can do to speed up your wifi connection and have graet time surfing in the internet.
First thing you have to do:

• If you are using google chrome, then open your chrome. Now click on the customization toolbar. Now go to tools and click on clear browsing data. Now click on clear browsing data 

Make sure that all the boxes are checked. You can also choose the time from which the data should be erased.

• If you are using Mozilla Firefox; then open you firefox and go to tool bar. If you menu bar is not visible, then just right click at the top and select menu bar. Now go to tools and select options              

and go to privacy. Now click on remove individual cookies. This is help you to remove the cookies that you don,t need. But there is no use i selecting like that

Click on remove all cookies and that it.
Note
When ever your browser slows down, then just do what I said and restart your computer. It will work.
Also see how to increase the wifi signal range