Currently my Bitcoin Core client was stopped syncing at 40.73%. It was not progressing any more. I've downloaded the Blockchain from https://getbitcoinblockchain.com/ . Can I just copy these blocks and paste these downloaded blocks to my Bitcoin > Blocks ? Will everything be fine ? Will the Bitcoin Core client accepts the downloaded blockchain ?
Yes you can download the blockchain from other sources then paste it inside the your main bitcoin folder. You will need two folders: - blocks - chainstate Then open bitcoin-qt for synchronization.