I've tried rebooting my machine several times and I cleared Steam's download cache. Report back soon m8! I had to restart steam 3 times then it worked, weird! Read more: The 'Verify Integrity of Game Files' option is accessible via the Steam client and will ensure the installation is complete.
This is Steam Validating Files Stuck At 100 Not a Typical Dating App. 2018 If your launcher is stuck updating, there are a few troubleshooting Online\The Elder Scrolls Online\ C:\Program Files (x86)\Steam\.
A Steam user suggests on forums that 'For those who have an SSD, make sure you have at least 30GB of free space on your drive or unpacking will be very slow. I've done this before on moving from windows -> ubuntu, but it's been stuck at 100% verification for 4 or 5 hours - validating Steam cache files 0 out of 1, validating Team Fortress 2 file 1 out of 1.