Hi Regile Reg and everyone
Just to give a background - I updated to 1709 around mid-December. Following a week of random freezes, I rolled back to 1703 and no further problems occurred. In mid-January, I accidently updated again to 1709. Once it had done, I disabled fast boot as some users have reported to have done. Two weeks on and there have been no freezes. So the issue appears to have gone away. How - I'm not certain.
- either the roll back to 1703 and then forward to 1709 possibly cleared some corrupted files 2) or the disabling of fast-boot
If it does freeze again, I'll post here