i fd up my windows 10 installation

[Fartbox]

i have 2 os and now windows 10 is not working. When i select windows 10 in boot manager it shows error: no server is specified. And i dont have a windows installation disk and the other os is useless in this situation so is there any way to fix this like with grub or something?

 

[basroil]

Just repair install using https://www.microsoft.com/en-us/software-download/windows10