You can improve your internet speed from within windows, without installing any software. Just do the following:
1. First, write “gpedit.msc” in the run and click OK button.
2. Then you can see the “local computer policy”, click configuration, then click the “Administrative Templates”.
3. Now click the network.
4. You can see “Qos packet scheduler”. Click the “Qos packet scheduler”.
5. Here you can see the “Limit reservable bandwidth” on right side.

6. Double click the “Limit reservable bandwidth”
7. Now you can see the dialogue box of Limit reservable bandwidth. 8. Check mark the Enable and in the bandwidth limit box have to write decimal value “0″ then apply and OK. Connect to internet and enjoy.