Toshiba A105-S4014 D:/ Drive Missing

I have the Toshiba A105-S4014. My brother was messing with my computer yesterday and now it says I don’t have a d:/ drive. I tried uninstalling the drivers and the drive itself and then reinstalling and it just says “The driver may be corrupted or missing”. I tried this process actually a few times. The name of the drive is Matshita DVD-RAM UJ-841S. My brother suggested I just buy a new drive :-\ Can anyone help me out with this?