My Lumia 520 (INDIA) is 2 years old and the latest update available for it was LUMIA DENIM (I did an update check just 30 min ago). Phone was lagging a lot from last few months and was automatically restarting occasionally e.g while uploading pics to One Drive it will restart 1 in 100 times of uploads. So I did a reset by going into settings --> about --> reset and during reset my phone automatically got frozen ont his screen:

The sentence on frozen screen says: "If you'd like to know more, you can search online later". It is in this frozen state from last 1 hour. I don't know what to do next

The sentence on frozen screen says: "If you'd like to know more, you can search online later". It is in this frozen state from last 1 hour. I don't know what to do next