you are using      
skype latest version not supporting don't worry you need to update servise pack in  SP3    then click here and download  NETWORK INSTALLATION 





Note :

1.Don't burn cd or other  .
2.Just download and install normally .
3.don't  need any  boot for update sp3 .
4.after install  restart your computer  and enjoy .
5.  any problem   click here and contact with me live chat