My previous version was 0.14 or so.  I installed 0.17.1 and it seemed to delete all of the blocks on the SDD and then download them from scratch.  I have an i3 Intel Processor, 4 GB RAM, 320 SSD HD, so fairly new computer about 1-2 years old.  I have set the memory in Bitcoin Core to 2000MB in the settings.

In my task manager the Disk IO is maxed out at 100%.  I have 8 connections to the network.  Time to sync says 4 weeks.  Not sure why it is taking so long.  Been 1.5 days.