Silent installation does not ask for admin rights if necessary

Hi,

If I try to run the installer with the /S switch from a non-admin account I will get an error message saying it can't write the file to the installation directory. Launching it silently from an elevated command prompt does work however.

A solution would be to implement a similar admin rights check like in the normal installer. Once you launch the silent installer it should check if it has admin rights and if not it should ask for them (UAC prompt).