Download the bootstrap zip file (txindex is enabled for this bootstrap) Bootstrap w/ txindex Download
Unzip the bootstrap. There will be two folders,
Navigate to your \Zelcash\ data directory
Copy the bootstrap folders and paste into your \Zelcash\ data directory. Overwrite the current
chainstate folders if necessary.
Launch the full node wallet. You will see that the heights and headers are already pretty close to the current block height. This will save many hours of syncing.