No doubt you've seen all the other postings regarding this.
Go to Symantec.com and download the fixing tool to remove W32.Blaster.Worm. Then go to Windows Update and get the patch to stop it happening again.
Surface Pro (2017) vs Surface Pro 4
20 groundbreaking 3D animation technologies coming to Siggraph 2017
iPad Pro 12.9 vs Surface Pro 5
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.