iTunes won't open
I have a Sony Vaio laptop which i bought in january 2013 and have recently had it repaired as it had some problems with the Sony software. I had to reinstall iTunes and it opened fine but obviously my whole library had been wiped so I had to import all my CDs again. I went to start this today and iTunes won't open. I have tried uninstalling and reinstalling but this hasn't worked? Please help!
iPhone 4S, iOS 6.1.4