Windows 10: Windows update last night - laptop not working now

Hi.. So, my lenovo Z51 was working perfectly, however last night Windows updated and today.. It's not working.

When I turn on the laptop the first error pops up just before I type in my login details.

Ctfmon.exe - sucess
Unknown hard error

I then click OK and it says

Sihost.exe - system warning
Unknown hard error

I then click OK and I can type my username and password and it takes a long time to log in. The most recent try it just continues spinning the welcome message and doesn't log in properly.

My desktop now has no icons, except the recycle bin (which it doesn't let me view) and I cant go in explorer to see my docs etc.(it takes a very long time to log in, and doesn't work every time) The WiFi isn't working, although device manager says it is enabled. I have started in safe mode via msconfig, also disabled all of the start up programs but no change. Explorer.exe isn't running in task manager so I can't exit it and restart it. I can't get into control panel either and do a system restore.
If I click on the start button or right click on the task bar, nothing happens.
I am not hugely techy but I am competent in Windows and have been fiddling around today and can't get it resolved. It's very frustrating that the windows update has done this *Sad
Any help would be greatly appreciated as I use the laptop for work.. Doh

Thank you

:)

 

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