Bootcamp + Windows 10 environment、Occurs when Bootcamp is installed to use a MAC keyboard etc. on windows。
Windows 10 "System Protection" cannot create restore points and does not work。

The error is 0x80042306 、Shadow copy error。

— solution —

Use the tool "Autoruns for Windows" distributed by Microsoft。

First of all、Download and unzip Autoruns for Windows。

https://technet.microsoft.com/en-us/sysinternals/bb963902.aspx?f=255&MSPPError=-2147217396

Start the unzipped "Autoruns.exe" with administrator privileges。

Enter "apple" in Filter to narrow down。

Uncheck "AppleHFS" in it。

After that, you can use "System Protection" by restarting your PC.。