Donna goforth, yes it sure could be. First thing to check is that the air inlet vents are not obstructed. If those are good, you will have to disassemble your Laptop.. the clean it properly of any kind of dust etc. Replace the thermal paste on the CPU and check the fan. I would definitely replace the fan since the computer is disassembled anyway. Use this [https://www.youtube.com/watch?v=MYqDgdMrE8s|decent video] to work on your Toshiba.