Ok, if you use the SmartChain application, it will automatically bootstrap your wallet and speed up the sync. Stop your wallet, backup your wallet.dat from %appdata%/radium, and then delete the "database" and "txleveldb" folder, and the blk0001.dat file.
Download the SmartChain from here
https://github.com/JJ12880/SmartChain/releases , and start the SmartChain. The SmartChain application will take care of the wallet setup for you automatically.
Remember, DO NOT delete your wallet.dat file, because that is where your radium are stored.
Keep me updated.
JJ