I re-wiped the hard drive and formatted it to NTFS, and then used the disk manager from another laptop to change it to GPT! The CD/DVD drive,(I had changed boot order to look at the Optical drive first), with a Win7 install disk was not recognized at boot up to facilitate a complete new Win7 install over top of the current Win10 OS. (No going to Settings to revert back to previous OS.) Click 'Finish' when the format completes to power off the laptop.I have a Toshiba C55t-A5123 that had a Windows 10 upgrade installed on to a wiped hard drive. Select the second option if the drive contains bad sectors.įollow the on-screen prompts to complete the process. Select 'Delete All Data and Partitions From the Hard Disk' or 'Delete All Partitions and Overwrite All Sectors on the Hard Disk' if you choose to wipe the drive. The first option will remove all data from the entire hard drive, the second option will remove all data from the first partition and the third option will remove all data from the drive and reinstall Windows to a partition of a specific size.

Select 'Recover to Out-of-Box-State,' 'Recover Without Changing the Hard Drive Partitions' or 'Recover to a Custom Size Partition,' if you chose to recover to factory conditions. Start over from Step 1.Ĭhoose your keyboard layout from the drop-down menu and then click 'Next.' Enter your administrative password and then click 'OK.'Ĭlick 'TOSHIBA Recovery Wizard.' Connect the AC adapter to the laptop and click 'OK.'Ĭlick 'Recovery of Factory Default Software' to restore the hard drive to its original state click 'Erase the Hard Disk' to wipe all data from the drive without reinstalling Windows. Press 'Ctrl-Alt-Del' to restart the computer if Windows loads before entering Advanced Boot Options. Power on or restart the Satellite and press 'F8' when the Toshiba logo appears.

Boot disk for toshiba satellite c55