Its only at 73% now, and seems to be slowing down as it slowly progresses.
1. in Bitcoin Core, go into Settings > Options
2. change the 'Size of database cache' box
a. if you have 4GB RAM, put 2000
b. if have 8GB RAM, put 4000
c. if you have more than 8GB RAM, put 6000
3. click OK, shut Bitcoin Core
4. start Bitcoin Core again
Should go faster after that