Hi Potatim, I have a similar problem. I did a downgrade from w8 Toshiba Satellite C855D to w7x64. I have an old distribution cd w7, but not booteable. So, I prepared a boot w7 pendrive, added all cd´s files and went ahead with the pen drive into Toshiba laptop. I were able to format the disk (after change its settings), I installed w7 and all ok. BUT, I did not followed your advise and I did not made backups, so I installed a lot of drivers from AMD and Toshiba. By the way, it was possible because I have a wireless usb adapter and I can do all the work with it. BUT, I can not get the wireless internal controler to work. So, I should use my old wireless usb adapter if I want internet...
What can I do to set up the wireless internal controler ?. Do you have some advise ?. Thanks in advance for your time.