Toshiba Satellite C855D-S5303 wont boot to usb nor disk

[Mrti]

So I have a Toshiba Satellite C855D-S5303 that has had windows tech preview installed on it. But when I tried to boot into it, it said that the windows signature wasn't correct and it would continously going into that window. I then tried to install a newer version of the tech preview and ubuntu, but neither succesed (they were on usb.) I also tried to install Windows 7 by a disk, but that didn't boot to either. I pressed F12 to boot into the boot order, select to boot into usb or disk and neither worked. I set usb to the first option and it didn't even boot to the usb. It might be the usb's that might not be bootable fully, but on my win7 pc i got all of them to successfully be read as bootable. I booted into the bios serveral times and set the boot mode to CSM mode and UEFI mode but neither would boot from the usbs or disk. I have the InsydeH20 Setup Utility BIOS on my PC. Any support that could help will be great! Thanks, Mrti.

 

[CaedenV]

1) While you should be able to boot from linux on a USB drive, Windows will throw a fit and whine and moan until you install it local. There are some distros of Windows that can boot from USB, but they tend to be things like BartPE and other troubleshooting or recovery environments rather than 'full windows'. I thought that Ubuntu was USB friendly... but it has been a long time since I have used it so I could very well be wrong on that. But windows should absolutely be installed locally.

2) When you first installed the technical preview did you make a backup, or at least leave your recovery partition alone so that you can reload to your pre-preview state (running win7/8)? Or did you blow everything away and do a full install of win10 on your device?

3) I have seen the license/signature issue crop up before when someone chose to do an 'upgrade' when they actually did a full install instead. The only way to really fix it is to reformat the drive and try again with a fresh install. If you are careful then you can avoid blowing away the recovery partition, but pretty much everything else is going to have to go to make this work.

4) Any chance your drive is having issues? If it is dying then that could certainly cause problems.

Outside of that your laptop should be able to run win10 just fine. Hope something in this helps.

 

[sharndowg]

Go into the bios and disable "Secure Boot" then try again

This worked for me only a few days ago,

Hope its helps.