My download speed has become too slow after i upgraded my internet speed?

Is that so? Slow internet happens for various reasons. You might have poor hardware connecting your machine to the wall. Maybe your modem-router is not configured
correctly.
The most effective method for speeding up a comp where possible is just format the hard disk. Also check to see if you have any useless programs.

Uninstall them. Run disk cleanup. Check to see what you have in your temp. Generally have a clear up of your hard disk. ELSE
These are just some of many possibilities. If you think that your internet connection is slow, Follow these :- 1 .Switch to a different browser
2.Remove unwanted add-ons, extensions, and plugins
3.Close unused tabs
4.Allow (some) cookies and caching ...
scan your computer for viruses and spyware using suitable programs(for example- avast anti virus or spybot). If you still experience the same problem I
would advise you to delete the computer after backing it up, and then installing a new copy of Windows. if your problem is with programs running slowly- I
can advise you to download this software, which can extremely help- CCleaner.Good Registry Cleaner will improve your computer and Internet performance dramatically! Do all these and
Perform speed here scanmyspeed.com once it will sounds better ...