Hi, I'm a developer using Visual Studio 2005 and a .NET 2.0 application. The app work fine on Windows XP but not on Windows 7. The app writes to a specific keys under HKLM\MyCompanyName. Is it possible to make HKLM\MyCompanyName (and child nodes) fully writable (both programmatically and manually) while maintaining the general Windows 7 security for other parts of the HKLM registry? Any changes could be made manually because the app is a low volume, technical app that gets installed on a dedicated PC in a factory. Ideally there should be no UAC prompts and no Registry Virtualisation or any other software source code changes should be required, only changes to an existing installation of Windows 7. Thanks in advance, Alain

It's not very good practice for sw to write to hklm but you know that already. You need to set write permissions to the key in question. You can do this by rightclicking the key and setting write permissions for say "Domain Users" or Builtin\"Authenticated Users". "Everyone" if desperate. We use the great Procmon tool to look for Access Denied for a given process - sometimes it's not just that key that needs permissions so a useful way to solve further issues. Also check SubInACL and Regini for reg permissions programmatically. Hope this is of some use. BigWallop