Disable Skype ads: 1.) Add hosts to your hosts file 2.) Flush DNS resolver cache (ipconfig /flushdns)

hosts

# On Windows 7, 8, 10 Hosts file is in c:\windows\system32\drivers\etc\hosts
#
# Block Skype ads

127.0.0.1 secure-sin.adnxs.com # On skype 7.*
127.0.0.1 *.adnxs.com # On skype 7.*
127.0.0.1 logi10.xiti.com # On skype 7.*
127.0.0.1 *.everesttech.net # On skype 7.*
127.0.0.1 pixel.everesttech.net # On skype 7.*
127.0.0.1 d.adroll.com # On skype 7.*
127.0.0.1 *.msads.net
127.0.0.1 *.msecn.net
127.0.0.1 *.rad.msn.com
127.0.0.1 a.ads2.msads.net
127.0.0.1 ac3.msn.com
127.0.0.1 ad.doubleclick.net
127.0.0.1 adnexus.net
127.0.0.1 adnxs.com
127.0.0.1 ads1.msn.com
127.0.0.1 ads2.msads.net
127.0.0.1 aka-cdn-ns.adtech.de
127.0.0.1 apps.skype.com # keep this if you want to see Skype Home.
127.0.0.1 b.ads2.msads.net
127.0.0.1 bs.serving-sys.com
127.0.0.1 cdn.atdmt.com
127.0.0.1 cds26.ams9.msecn.net
127.0.0.1 db3aqu.atdmt.com
127.0.0.1 ec.atdmt.com
127.0.0.1 flex.msn.com
127.0.0.1 g.msn.com
127.0.0.1 live.rads.msn.com
127.0.0.1 msntest.serving-sys.com
127.0.0.1 rad.msn.com
127.0.0.1 sO.2mdn.net
127.0.0.1 secure.flashtalking.com
127.0.0.1 static.2mdn.net
127.0.0.1 static.2mdn.net