Oh I see - I use Kaspersky as well and it is set up to use the Windows Firewall - glad you were able to resolve the problem
On your "Metro" page where you see all the apps, the bottom left corner app should be "DESKTOP", click on it and you will be on Desktop Mode and then you will be able to go to your Yahoo! Games as usual.
Also you might want to install this little program (got info from PC world newsletter) :
http://windows8startbutton.com/
It will install a "Start Button" on your computer and choose Win 7 appearance - it will be almost business as usual with that button!!
- - Restore Windows Start button and Start menu on Windows 8!
- - Make 'desktop mode' as your default Windows startup screen
- - Choose appearance: classic windows, aero mode, Win 7 and more!
- - Restore all your familiar windows menus and options
- - All that and more, absolutely free!
Hope this helps you
LouiseA