How to block ads in Skype

1. Open this file for edit: C:\Windows\System32\drivers\etc\hosts
Note you will need to open your text editor in administrator mode in order to edit this file.
2. Add the following lines at the end:

127.0.0.1 live.rads.msn.com
127.0.0.1 ads1.msn.com
127.0.0.1 static.2mdn.net
127.0.0.1 g.msn.com
127.0.0.1 a.ads2.msads.net
127.0.0.1 b.ads2.msads.net
127.0.0.1 ad.doubleclick.net
127.0.0.1 ac3.msn.com
127.0.0.1 rad.msn.com
127.0.0.1 msntest.serving-sys.com
127.0.0.1 bs.serving-sys.com
127.0.0.1 flex.msn.com
127.0.0.1 ec.atdmt.com
127.0.0.1 cdn.atdmt.com
127.0.0.1 db3aqu.atdmt.com
127.0.0.1 cds26.ams9.msecn.net
127.0.0.1 sO.2mdn.net
127.0.0.1 aka-cdn-ns.adtech.de
127.0.0.1 secure.flashtalking.com
127.0.0.1 adnexus.net
127.0.0.1 adnxs.com
127.0.0.1 *.rad.msn.com
127.0.0.1 *.msads.net
127.0.0.1 *.msecn.net

3. Save file and restart Skype.

If this does not help, or helps temporarily only, then this means that Skype uses some DNS name (or IP) of ads network not listed here.

How to remove popup ads:

1. Open the following dialog in Skype: Options>>Notifications>>Alerts and messages;
2. Uncheck Help and Skype tips and Promotions items;
3. Save options and restart Skype.

If this does not help, or helps temporarily only, then this means that Skype uses some DNS name (or IP) of ads network not listed here.

Learn here how to kill Skype ads roughly using SkypeAdKiller application. This application removes ad-banner from running Skype.