Hi MrVladistok,
You are going to need to completely re-install Windows 10,ther is no Windows 10 Boot partition on your drive.
You will need to create a bootable Windows 10 USB on another working Windows device
Click this link:
https://www.microsoft.com/en-us/software-downlo...
to download the Media Creation Tool (Click on Download Tool Now), with that you can download the latest Windows 10 ISO (Select Create Installation Media for Another PC), you can create a bootable USB flash drive (min 8GB) using that tool
Then, Boot your PC from the Installation Media you just created (change Boot Order in your BIOS) to begin installing Windows 10
At the start of the installation process, there is a Window with two large buttons, select the bottom button (Custom; Install Windows only) then on the next window, select each partition on your drive and delete it. When the whole drive is marked as unallocated space, select that and click 'Next' to begin the installation.
Since you previously had Windows 10 installed and activated on that PC during the installation process skip the steps which ask for a product key and select the option 'I am Reinstalling Windows 10 on this PC', and activation will not be an issue, your PC will have a digital entitlement stored on the Microsoft Activation Servers
Make sure you install the same Edition of Windows 10 (Home, Pro... etc.) you previously had installed to avoid Activation issues