PC will no longer boot after failed installation version 1709

Thanks to everyone who replied. The matter was rather urgent and I wasn't able to fix the problem myself so I handed my laptop over to the technician employed by the university department in which I work. He managed to get the computer up and running, but in the end he had to save all my files, eliminate a large number of programs I'd installed, and do a clean install of Windows 10 (which is now version 1709!!).
He removed my version of Microsoft Office 2010 and installed Office 2016, but I hadn't previously saved contacts and calendar as .pst files, so I have lost of that. Still, much better than losing all of my documents.

Nice to hear that you have a functioning computer.

Perform the following steps:
1) Open administrative command prompt and type or copy and paste:
2) sfc /scannow
3) dism /online /cleanup-image /restorehealth
4) chkdsk /scan
5) When these have completed > right click on the top bar or title bar of the administrative command prompt box > left click on edit then select all > right click on the top bar again > left click on edit then copy > paste into the thread
6) Run HD Tune:
http://www.hdtune.com/
a) Health scan
b) Benchmark
c) Full error scan
Post images of the 3 scans into the thread using one drive or drop box share links:
Take Screenshot in Windows 10 General Tips Tutorials
7) Open administrative command prompt and type: chkdsk /x /f /r
This may take many hours so plan to run overnight
8) Find the result of the chkdsk scan in the event viewer and post the results into the thread:
Read Chkdsk Log in Event Viewer in Windows 10 Performance Maintenance Tutorials
9) Create a backup image using Macrium:
Backup and Restore with Macrium Reflect Backup Restore Tutorials
10) Place the backup image onto another drive or into the cloud