Hi,I have a Toshiba Satellite C670 (PSC3LC-01D00Q), and i have tried all of the above methods, either they didn't work, or i could not find the file location where they were supposed to be. my laptop is doing something very strange, the spacebar, tab, and shift, also the keys, 1, 2, 3, and 4 will not work unless i hold fn then hit them, also the symbles attached to numbers 1 to 4 i can not get them to work, unless i hit the combinantion of shift/f/nnumber. and none of my f1 through f12 will work now either, only on startup to get into BIOS, and that was no help either. Delete will not work to. please, need some help, i have dug very deep into my computer system and have found nothing that fixed it. any suggestions are welcome!