i need to change my default browser through my coding and so first i try to figure it through regedit (registy keys) http://stackoverflow.com/questions/968449/how-do-i-change-default-browser-using-c-sharp-or-batch-file as mentioned i used reg key{HKEY_LOCAL_MACHINE\SOFTWARE\Classes\http\shell\open\command} then i manual change my web browser from internet explore to chrome. but after i refresh values does not change in reg key. why this happen??? how can i detect my default browser in reg key?