With starting command prompt with cmd /e:off or using setlocal disableExtensions (in a batch file) or excluding them through the registry value HKEY_CURRENT_USER\Software\Microsoft\Command Processor\EnableExtensions (by setting the value to 0) the feature called "extensions" is disabled (turned on by default).

What are the changes that this causes?

CodePudding user response：

Turning off extensions affects some built-in environment variables and some internal for the command prompt commands. I've never seen full list of non-working variables ,though the internal commands are more or less well documented - but never put in a list together.

I. I'll start with the variables: