Drivers for new printer won't install

Printer Brother HL 1110 laser........   seeing as printers hate me I was patting myself on the back as I got it all set up, ran off the test copy then inserted the Driver disk.

 

So of course it doesn't work.   It gets so far then I get this message ..."DIFX DRIVER PACKAGE INSTALL ERROR =5 and it's stuck.

I've tried everything .......    someone said to disable anti virus so I did, made no difference.   Went to Brother Support Centre and wrote long story and get this message Error 404 Forbidden access so can't report it. .   Googled the error message, seems it's quite common.   Someone said to run as Administrator but can't find how to do that. So many fixes that I can't understand. Tried finding the drivers online but cant.

 

Can anyone help me or do I package the whole thing back up and return it?   So disappointed   It's such a neat little printer, perfect for me.  

Running Win 7 on HP laptop.