Last week's answers

If you missed one of the answers from last week's show, read them here.

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• Itunes Has Been Wiped But I Still Have My Ipod

  Can I save my music?

• My iPad contacts are duplicated

  After syncing my new iPad, a lot of my contacts are duplicated. How do I solve this?

• An app has disappeared from my iPhone

  The eBay app on my iPhone has vanished and I can't re-install it. Why is that?

• I can't get videos to play on my Windows PC

  I have a new Windows 7 PC and I just can't get videos to work on it using Windows Media Player. How can I fix it?

• "Windows Explorer has stopped working"

  I can't run any updates on my PC, either for Windows or any other programme. It says "Windows Explorer has stopped working".

• Do I need an anti-virus on my Mac?

  If I put Microsoft Office for Mac on to my Apple computer, do I need to also add an anti-virus program?

• Email disappearing from iPhone

  I've got an iPhone and when I read an email, they disappear after a couple of minutes. Why is this happening?

• Help! My iPhone has died

  My iPhone 4 has gone completely dead and won't even let me do a Factory Restore. What can I do?

• How do I make my laptop battery last longer?

  I've just had to get a new battery for my laptop, so how do I make it last as long as possible?

• How can I remove this Anti-Vir virus?

  I have a virus and can't run any programmes to get rid of it. What can I do?

• How do I lock my wireless?

  How do I lock my wireless router so people can't get access to it? I have a NetGear router.