If when running Process Monitor in Windows 10 you get the error
Unable to write PROCMON23.SYS.
Make sure that you have permission to write to the %%SystemRoot%%\System32\Drivers directory.
then you can follow the suggestion from Error from Process Monitor: “Unable to write PROCMON23.SYS”: "go into C:\Windows\System32\drivers and rename procmon23.sys to something else, then try to enable boot logging from options menu again".
