The file attributes downloaded by the browser are protected. How to remove them

reg add "HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments" /v SaveZoneInformation /t REG_DWORD /d 1 /f

reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments" /v SaveZoneInformation /t REG_DWORD /d 1 /f

above 2 Command to protect , below 2 Change the command to IE Blank home page .

reg add "HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main" /v "Start Page" /t reg_sz /d about:blank /f

reg add "HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main" /v "Default_Page_URL" /t reg_sz /d about:blank /f