Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
What is the correct way to create a file extension (and maybe a MIME type) that will run from your local file system without prompt, but if you browsed to that file through Internet Explorer or Firefox you would get prompted (warned)? What is the exact mechanism in the windows registry that controls this?
This mechanism is not controlled by the registry.
What IE does is add a NTFS stream to downloaded files, specifcying which zone it was downloaded from.
For example, I just downloaded notepad++, and performed the following command to show the alternate stream:
c:\Downloads>more <npp.5.4.5.installer.exe:Zone.IdentifierWhich outputted:
Windows explorer / ShellExecute uses this alternate stream as a means to trigger the “unsafe” warning.