The error message, "This app can't open. App can't be opened using the Built-in Administrator account." is not a normal error message one would encounter in the use of their Windows 8/Windows 10 computer. This issue is likely being manufactured by someone who modified Windows 8/Windows 10 by Disabling EnableLUA without a complete understanding of User Account Control and Admin Approval Mode. To quote the popular website Windows IT Pro, "This is not a supported state of the OS and will block the modern applications-- so don't do this." EnableLUA controls not only User Account Control but also Admin Approval Mode. By default in Windows 8/Windows 10, EnableLUA is Enabled. On the internet, there is the mistaken belief that setting EnableLUA to Disabled is an inocuous registry setting one can use to Disable User Account Control. This is incorrect. If EnableLUA is set to Disabled then Admin Approval Mode is Disabled which results in the error message:...
Technical Adventures in the World of IT