SL is asking me for Administrator password, but I didn't set one.

You can't just press enter? Did it not ask you for a password before a certain date and it just randomly started doing it?

 

If there is no password, then that is the password. Just press enter.

Some applications need to access folders (write to them) that are normally write protected, but by you entering your credentials (user name + password) you give the installer of that application allowance to write to those folders in order to complete the install.

The password dialog is essential in Mac OS X' security, as that allows malware and trojans not the be installed by themselves, but you have to install them manually.

 

No need to double post, especially if it is directed at me or Miles, as I haven't seen your edit while writing my reply.

 

I posted one minute after your original. You didn't edit it that fast Spinnerlys, on the other hand, is a slowpoke.

 

Yeah, that's only because I used more letters than you and I have the super fast MacBook Wheel under my index finger.

But you're from Switzerland, so that makes me really super slowmotioned, if I remember that stupid prejudice correctly.