My toshiba satellite L15-B1330 Laptop has a problem of starting windows

[nishimwe]

Here I have a toshiba satellite L15-B1330 Laptop with one partition on HDD plus windows 8, it gives me a message said that Reboot and select proper boot device or insert Boot Media in selected Boot device and press a key but I tried to use HDD in other computer and it works property. I liked to change boot mode from UEFI to CSM or legacy in BIOS setup but this machine have not that point. can you help me to resolve this kind?

 

[ragnar-gd]

So, what did you change before the problem occured?

 

[nishimwe]

So, what did you change before the problem occured?

Mr Ragnar I changed from gpt to mbr using other machine bcz this toshiba didn't accept any boot drive. after converting I installed windows 10 in HDD and taking it back in toshiba and it displayed a message that winload.exe file is corrupted or missing. Ichanged windows 10 to windows 8 but nothing changed. after someone used this HDD in other machine and delete the partition which has boot folder and the one which has BCD. after backing my HDD in toshiba the message changed to Reboot and select proper boot device or insert Boot Media in selected Boot device. I tried to rebuild BCD using other machine in command prompt but still now the message ocurred.

 

[ragnar-gd]

Forgive me if i'm confused:
Did you format the HDD in your Laptop at the last occasion?