These laptops were infamous for the overheating issue. It got so bad that the solder that holds in the power socket inside the laptop will eventually melt and short ground to +12VDC. Not good. I had 4 of them dead in a pile.
If I remember correctly, there was a class-action lawsuit. I think the final remedy was Toshiba extended the warranty by one year. Big whoop!
My advice... get that data onto a new drive. The heat will eventually kill the drive that you are currently using.
Good luck, wish I had better news for you.
I think that was the HP laptop that had the overheating issue (I still have that boat anchor). But Toshiba may have a similar problem ...