If you have slow net speed,Try to keep in mind the following instructions
1.Get a download accelerator
2.Turn off all unused apps while downloading
3.Don't upload information while you're downloading
4.You must always keep your computer clean of any viruses
5.clear your temporary download history files.
6.Use latest version of any browser
7.Do regular speed test.
When i had the same problem,i followed the same ways.I am sure,it's very useful to increase your net speed.Then you can check your new internet speed using ScanmySpeed.com