Recently I was contacted by a customer who needed assistance after Windows 10 Update 1803 had failed on her PC. She was getting a blank screen after the PC updated and then did a reboot. This is always the worst case for any computer. You turn it on and the screen is blank, or nothing happens at all.

The issue seems to be related to KB4103721 Version Windows update 1803 patch for Windows 10 April 2018 Update. What we understand is that Microsoft is working to fix bugs in the Windows 10 April 2018 Update, however a recent cumulative patch, titled KB4103721 Version Windows update 1803, which aimed to address some of the issues found in the update, looks like it actually causes some problems on certain PCs.

Attempt to Fix Windows Update Blank Screen issues:

  1. Enter Safe Mode, which will require booting Windows 10 from a USB drive. Yes, you will need a USB thumb drive or USB hard drive. To complete this task.
  2. Next step download the Windows 10 April 2018 Update 1803 (64-bit) ISO image directly from Microsoft (or the Windows 10 April 2018 Update 1803 (32-bit) ISO file if you have 32-bit hardware).
  3. To make a bootable USB drive use Microsoft’s Windows USB/DVD Download Tool on another PC.
  4. Boot from the USB drive. Access the boot menu and select USB. This action varies based on PC manufacture.
  5. Once Windows 10 setup wizard starts, click ‘Next’, then select ‘Repair your computer’. Then go to Troubleshoot > Advanced options > Command Prompt.

When the Command Prompt appears type in:

bcdedit /set {default} safeboot minimal

Press ‘Enter’ then close the Command Prompt window and click ‘Continue’.

Note: Windows 10 should now boot into Safe Mode.

Safe mode will allow you to open the Command Prompt. To access the command prompt, go to the bottom of the tool bar search and type “CMD”. This will display the command prompt option in the results. Right click on the CMD search result and select “Open as Administrator”.  Once the command prompt opens type in the following commands:

sfc /scannow

chkdsk /f /r

You could also try:

chkdsk /r



Once again go down to the search bar in the Windows taskbar and type ‘System Configuration’. When system configuration opens Click the ‘Boot’ tab, then uncheck ‘Safe Boot’ and click ‘Apply’. This will stop your PC from always booting into Safe Mode. Restart your PC now. The PC should load Windows 10 without being in safe mode. Windows update 1803 is a tricky one.

Learn about Windows 10 1803 from the Microsoft video below:

If you need additional assistance, contact ZOBOLT. We offer local business computer support and remote PC support.

About Author: Jenna Whitmore is an IT consultant and U.S. Army Veteran. Her experience includes, computer networks, wireless networks, security and cloud solutions. Jenna is certified on Cisco, Extreme routing network equipment. She has worked as a network system engineer and IT consultant for over 20 years. Contact ZOBOLT: 206-219-3060