I had to buy a usb wifi adapter.  it still looses internet connection all the time.also on many web sites pc has no ability to scroll or  search but my mouse works fine otherwise .it also freezes RAM often and will not keep my recent data.  its speed 3.9 ghz is a lie.  it barelyperforms at 2.6 ghz. most of the usb ports don't function.  do not buy this pc.  the whole sales info is a pack of crap!  Now the video card has craped out.  I will never buy another pc from amazon.  The whole  " refurbished "  is a flat out lie!