Windows Update finally offered an update from Version 1909 Build 18363.1500 for my
Lenovo Yoga Laptop (ThinkPad) Model 20CD, i7/8GB/256GB SSD. After two attempts that
failed after 20 hours with the message "There were problems installing some updates but
we'll try again later. Feature update to Windows 10, version 20H2 - Error 0xc1900104", I
cut my losses and used the WMCT to do a clean install.
Since the update was finally offered I assumed that the warning "don't use the WMCT to
update Windows when you have a Conexant driver" no longer applied.
The installation and update to the most recent version took under an hour. When I heard "Hi I am Cortana" I knew that sound was working in the latest version of Windows.
After the WMCT initial install, Cumulative update for W10 Version 20H2 KB5001330 took
a bit longer but the update went fine. Windows Update provided Conexant audio driver
8.66.16.50 but Lenovo driver support shows an older version of this driver (8.65.56.52) which should
probably not be used. The only anomaly was that after the latest update, process
"windows audio device graph" at one point took 90% of the CPU. I stopped this process
and it has not been a problem since. Bottom line: systems affected by the update block
related to Conexant audio drivers may not always update successfully, but a clean install is
likely to succeed.