Upgraded my PC to Windows 8 and just want to confirm a few things.

1. My avatar and that of friends do not move (not 3D) in Xbox Live app, they are just static/pictures. Is this normal or I'm lacking a plugin?

2. I installed Microsoft Silverlight and it seems internet explore is not using it. Firefox shows my moving 3D avatar at Xbox.com but in IE10, the are just static....like pictures. Is this normal?

3. I now can't install my dell wireless driver, it tells me driver not found but I used to install it from the net back in XP mode......any help? I'm now using LAN cable.

Any help how to fix these please?