Windows 10: No LCU available in Windows

After an update my Windows 10 didn't recognize the audio input and output devices on my computer, so I chose to use "system restore" to load a restore point to uninstall the update, after the restore my computer restarted for the first time and Entered the system; but when I restarted and entered the system again, the system could not be started and a blue screen occurred, prompting CRITICAL_PROCESS_DIED, and I could not use any safe mode, I could only enter WinRE, but this time I could not use "system restore" again , because it says "C drive is not a protected drive" although it is, I thin

:)

 

What is LCU / SSU

Oh thanks, is it possible not to use these abbreviations on the website?

Another question in this regard. It states that you have to install the SSU before the LCU, but does the LCU include this SSU, and for the next months will this SSU be valid to install before the next LCU because I have missed it in March or April?

 

Deploy Windows 10 SSUs and LCUs together with one cumulative update

Source: https://techcommunity.microsoft.com/...e/ba-p/1967887

 

What is LCU / SSU

As described in the recent 2 update histories, Microsoft Team can you please elaborate what is SSU and LCU? (Guess: SSU is Servicing Stack Update)

I cannot find a reference for this. Thank you in advance

Important When installing both the SSU (KB4093432) and the LCU updates from the Microsoft Update Catalog,
install the SSU before installing the LCU.

source: https://support.microsoft.com/en-us/help/4093107