Solved After updating my windows 8, I cant log in anymore

Very cool! :)

I would now go to Windows Update and to configure manual download immediately if you already have not.
 

My Computer

System One

  • OS
    8.1 Pro X64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Acer T690
    CPU
    Intel Pentium D Dual Core
    Motherboard
    Acer/Intel E946GZ
    Memory
    2GB (max upgrade)
    Graphics Card(s)
    Intel Graphics Media Accelerator 3000 - PCI Express x16
    Sound Card
    Integrated RealTek ALC888 high-definition audio with 7.1 channel audio support
    Monitor(s) Displays
    Acer AL1917W A LCD
    Screen Resolution
    1440 X 900
    Hard Drives
    350 GB Seagate Barracuda 7200.10
    Thumb drives
    PSU
    Standard 250 watt
    Case
    Desktop 7.2" (183mm) W x 17.5" (445mm) L x 14.5"
    Cooling
    Dual case fans + CPU fan
    Keyboard
    Acer Windows PS/2
    Mouse
    Wireless Microsoft Arc
    Internet Speed
    54mbp/s
    Browser
    IE11
    Antivirus
    Defender
    Other Info
    Office Pro 2013 / Nokia Lumia 1520 Windows Phone 8.1DP GDR1
What antivirus are you running?
 

My Computer

System One

  • OS
    8.1 Pro X64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Acer T690
    CPU
    Intel Pentium D Dual Core
    Motherboard
    Acer/Intel E946GZ
    Memory
    2GB (max upgrade)
    Graphics Card(s)
    Intel Graphics Media Accelerator 3000 - PCI Express x16
    Sound Card
    Integrated RealTek ALC888 high-definition audio with 7.1 channel audio support
    Monitor(s) Displays
    Acer AL1917W A LCD
    Screen Resolution
    1440 X 900
    Hard Drives
    350 GB Seagate Barracuda 7200.10
    Thumb drives
    PSU
    Standard 250 watt
    Case
    Desktop 7.2" (183mm) W x 17.5" (445mm) L x 14.5"
    Cooling
    Dual case fans + CPU fan
    Keyboard
    Acer Windows PS/2
    Mouse
    Wireless Microsoft Arc
    Internet Speed
    54mbp/s
    Browser
    IE11
    Antivirus
    Defender
    Other Info
    Office Pro 2013 / Nokia Lumia 1520 Windows Phone 8.1DP GDR1
I would perform a system clean. I use Ccleaner. There's a free version. http://www.eightforums.com/software-apps/2726-latest-ccleaner-version-released.html Watch so that nothing else get's installed unless you want it. Otherwise use disk cleanup. Then defrag.

In Windows update > Change Settings is the "Give me updates for other MS products" checked?

You may download all of the updates, but manually install 6 at a time. Reboot after every 6. We will see if an update was the culprit.
 

My Computer

System One

  • OS
    8.1 Pro X64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Acer T690
    CPU
    Intel Pentium D Dual Core
    Motherboard
    Acer/Intel E946GZ
    Memory
    2GB (max upgrade)
    Graphics Card(s)
    Intel Graphics Media Accelerator 3000 - PCI Express x16
    Sound Card
    Integrated RealTek ALC888 high-definition audio with 7.1 channel audio support
    Monitor(s) Displays
    Acer AL1917W A LCD
    Screen Resolution
    1440 X 900
    Hard Drives
    350 GB Seagate Barracuda 7200.10
    Thumb drives
    PSU
    Standard 250 watt
    Case
    Desktop 7.2" (183mm) W x 17.5" (445mm) L x 14.5"
    Cooling
    Dual case fans + CPU fan
    Keyboard
    Acer Windows PS/2
    Mouse
    Wireless Microsoft Arc
    Internet Speed
    54mbp/s
    Browser
    IE11
    Antivirus
    Defender
    Other Info
    Office Pro 2013 / Nokia Lumia 1520 Windows Phone 8.1DP GDR1
Just to be sure > Check that box.
 

My Computer

System One

  • OS
    8.1 Pro X64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Acer T690
    CPU
    Intel Pentium D Dual Core
    Motherboard
    Acer/Intel E946GZ
    Memory
    2GB (max upgrade)
    Graphics Card(s)
    Intel Graphics Media Accelerator 3000 - PCI Express x16
    Sound Card
    Integrated RealTek ALC888 high-definition audio with 7.1 channel audio support
    Monitor(s) Displays
    Acer AL1917W A LCD
    Screen Resolution
    1440 X 900
    Hard Drives
    350 GB Seagate Barracuda 7200.10
    Thumb drives
    PSU
    Standard 250 watt
    Case
    Desktop 7.2" (183mm) W x 17.5" (445mm) L x 14.5"
    Cooling
    Dual case fans + CPU fan
    Keyboard
    Acer Windows PS/2
    Mouse
    Wireless Microsoft Arc
    Internet Speed
    54mbp/s
    Browser
    IE11
    Antivirus
    Defender
    Other Info
    Office Pro 2013 / Nokia Lumia 1520 Windows Phone 8.1DP GDR1
When i was going to update to 8.1, i got a message who said i had to unistall several things before i could update to 8.1. It was programs like hp protect tools and maybe recovery manager, i dont quite remember. So i uninstalled what i was asked to do, and i updated. When i turned on my pc the day after, the screen said restoring or resestablishing( sorry, google translate). When it was done, the exact same problem as domo1986 appeared.
 

My Computer

System One

  • OS
    Win 8 8.1
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