This could be related to packet size or TCP\IP throughput.
can you go to start menu, type CMD in the run line, right click the cmd.exe link that appears aboce the run line and select 'run as administrator' this gives you an elevated command prompt, now please type netsh int tcp show global
press enter you will get a list of your current settings. If you can post a snip of it here I can have a look if there is anything can or needs changing. Tutorial how to use snipping tool and upload
. (just in case you need it, we don't know your experience level yet.)