About SMBv1 is no longer installed and, if after 15 days is no longer used, it is uninstalled automatically. This is due security problems (that raised at first with Wannacry), you can review these old blog articles as well:
Hacker - MS17-010 patch KB4012598 against Wannacry Ramsoware
Antivirus - WannaCry Free Decryptor tool
Official Microsoft article is:
SMBv1 is not installed by default in Windows 10 Fall Creators Update and Windows Server, version 1709
Be aware that shared folder using SMBv1 would no longer accessible from computer using Windows 10 1079.
You can re-enable SMBv1 as temporary solution before upgrading shared folder to a newer SMB protocol version.
Related articles:
https://www.devadmin.it/2017/12/11/windows-10-1709-e-smbv1/
