I had this problem long time ago (when i got my new gpu) and for some reason,i couldnt use my keyboard and mouse(they wouldnt move in the screen,or type)
i posted for help here,but after countless of hours,
i found out that IF i use a windows repair cd,i could move them and could actually "recover" my system. and thats how i fixed the problem,
Now,without actually thinking of what might happen,i putted my new gpu in then,and the same problem happend!!!
So i wasnt paniced like last time... so ... i got the Cd i had,tried it... and for some reason the cd wont identify my hardware either...
i am trapped.
things to keep in mind
i have tried to restart my bios...
i have tried to remove the battery
both keyboard and mouse ARE pluged in (Led on)
this is my secondary hard-drive which i didnt even try to run while i had my new gpu on(which made it safe to use)(SSD in my main opperating system and in my hard drive,i have my old one)
Any ideas? last thing i want is to send it to a proffecional...