If you are not using a genuine copy of Windows.
It is highly advised that you do not attempt to fix this any other way than installing and using a genuine version of Windows. Any attempt at fixing this error will most likely cause you to experience boot issues.
I am using a genuine version of windows.
It is rare for this to happen if your version of Windows is genuine. If you are confident that it is and want to take the risk you may fix this by opening an elevated command prompt (run as administrator) then type the following: bcdedit /deletevalue nointegritychecks
At this point just restart your computer and your Client should load as expected.