For the record we had this issue today on a user's machine - none of the custom components that we placed in the C:\talend_components folder we created were showing up and being available from the palette.
It was because the user had unzipped and located their actual TOS installation under Program Files which is otherwise restricted by Windows 7 UAC. As soon as we moved the installation to a standalone folder in user space, the custom components appeared and are working fine.
May save someone else tearing their hair out
Mark
Hi Mark, Thanks for sharing your solution and [font=Verdana, Helvetica, Arial, sans-serif]experience with us.[/font] [font=Verdana, Helvetica, Arial, sans-serif]Best regards[/font] [font=Verdana, Helvetica, Arial, sans-serif]Sabrina[/font]