Windows update - hard error

  Windowzupdate 18:19 18 May 2018

Hi.. So, my lenovo Z51 was working perfectly, however last night Windows updated and today.. It has issues.

When it turns on it now says 'sihost.exe system warning - unknown hard error'

My desktop now has no icons, except 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 everytime) The WiFi isn't working, altho 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. 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 :(

  Windowzupdate 18:20 18 May 2018

Any help would be greatly appreciated as I use this laptop for work :( thank you

  Windowzupdate 18:21 18 May 2018

(posting from my phone)

  Windowzupdate 18:26 18 May 2018

To be clear, first error when I turn laptop on just before I type my password

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

Thanks

  Fruit Bat /\0/\ 23:03 18 May 2018
  rdave13 00:18 19 May 2018

Also here .

If you can't see Windows explorer in task manager then click on File, Run New Task, and type explorer.exe then ok.

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