I'd like to share my experiences with KB4483234 on 17134.472 (Pro-64).
After struggling with 13 (!) failed updates, I've decided to take action.
1) Sfc could not continue after about 12%.
2) DISM...

Unfortunately, this one failed too:
0xC1900101 - 0x20017
The installation failed in the SAFE_OS phase with an error during BOOT operation.

At least, it tells me not to bother trying to use the...

Thank you. I'll try the repair upgrade.
MIK4170

Your par exellence batch runs very fast - is it possible to slow it down.
Is it possible somehow to slow it down?
During its run I noticed at least one entry "Access Denied" but it flashed away...