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


  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.

What is Markdown?

Markdown lets you add more formatting to your post. Simply type in your post and it will display as written.

If you wish to add bold or italic characters, add a hyperlink to another website, a heading or a horizontal line, simply use the relevent icons above the text input field.

A preview of your post will appear in the grey box below. If you make a change and you're not happy, simply press the back arrow icon to undo.

Post a Reply


Elsewhere on IDG sites

Google Pixel 3 review

Automatically create thousands of unique variations from one original design with this Illustrator…

iPhone XR release date, price & specs

Test : le Razer Phone 2