There are Two tricks that will help you to increase your internet speed..

First Method- Speed Up Your Net Speed By 20%

1. First you go to start button

2. Go To Run

3. Type gpedit.msc And Then Hit Enter.

4.Then Expand Adminsitrative Templates.

5.Then Network

6.Then QoS Packet Scheduler.

Now A New List Appear . Click On Limit Reservable Bandwidth.
Just Disable it.

Now You Click On Apply .

That's It Now You Are Done !! :)

Now Just Restart Your Computer . And I hope You will Get change in Your Speed

Some Basic Advises -

1. Use IDM To Boost Your Downloading Speed.

2. Use A Good Anti-virus in Your Computer.

3. Remove Unwanted Add-ons, Software,Unwanted Files Form Your Computer.

4.Update Your Drivers Periodically.

5.Keep A Good Maintennance Of Your Computer.