Hi,
To check for any software updates - with tv on, press blue youview button on remote. This will then come up with youview guide. Scroll left to settings, click OK on remote then scroll left to device management, scroll up to software update and click on get update. If there are any updates they will install automatically, if not just back out of you view.
If there are any updates the box will reboot.
You can then press red talktalk button on remote and click on my boosts to see which boosts are installed. Click on skysports boost if this is the free upgrade or boost you need and press OK on remote this will then come up as subscribed,then go to the first skysports channel. Install that channel and all other sky sports channels will automatically upload. Then just BACK on remote to watch tv.
Do make sure that this is the free upgrade or boost you have applied for by going to My Account and check that it is showing or you may be charged.
Best of luck
spacedoutman