No bootable device

[Lanie k]

I have a Toshiba c55 c after updating Windows 10 I started getting black blue screen errors so I tried to reset my device I tried my backup disc that does not work it's wasn't recognised so I made a new USB key try installing a fresh windows as I thought this would be best option and now I'm lost because when it comes to and where to install Windows I have 4 partitions but Windows cannot be installed on it I have also tried to as well to no avail it says Windows cannot repair your PC,/pc ran into problems or Windows there was problems repairing your device or no changes were made and your PC needs to be repaired error every time I tried to boot to what I thought was a recovery drive. I guess I'm asking does anybody have a clue because I've just got myself in a mess now I don't know where I am what to try next as I need my PC for work please? Any help I would be very grateful but if you can understand any of or that.
thank you

 

[Sedivy]

No, don't boot to recovery drive. You should have efi partition, recovery partition and then your regular (biggest size) windows partition. It's this last one you need to re-format ntfs and reinstall windows on.
Also if you used to have win 8.1 on there but are now trying windows 10, it's not going to work. I think you need to install 8.1 and upgrade, cause your product key saved on the mobo is for whatever windows version it came with.