Toshiba laptop suddenly won't start up

[MelanieL]

My computer worked fine. A week later I went to start it up and it kept starting up for five seconds with the message "preparing automatic repair" but then it shut down. This laptop has hardly ever been used. It's a toshiba satellite C75D-A7213 with windows 10

 

[COLGeek]

MERGED QUESTION
Question from MelanieL : "My Toshiba laptop suddenly won't start and has automatic repair message"

My computer worked fine. A week later I went to start it up and it kept starting up for five seconds with the message "preparing automatic repair" but then it shut down. This laptop has hardly ever been used. It's a toshiba satelkie C75D-A7213