Windows 10: Windows 10 lock screen flickering and wont let me log in

Hi everyone, Im having a very annoying issue with the new pc I built a couple of days ago, after installing the 2018-10- windows cumulative update 1803. My windows lock screen just flashes blue and black and doesnt let me do anything at all. Please any advice or help will be appreciated.

:)

 

Screen flickering in Windows 10 safe mode

I haven't made any changes on my device. This screen flickering is only happening in Safe Mode.

 

Screen flickering in Windows 10 safe mode

Hi Adhio,

Screen flickering can be caused by hardware or application issue.

To better assist you, please answer the following questions:

• Is the issue only happening in Safe Mode?
• Have you made any changes on your device prior to the issue?

In the meantime, we suggest following the troubleshooting steps on this article:

Troubleshoot screen flickering in Windows 10 to resolve screen flickering issues on Windows 10.

We're looking forward to your reply.

 

Screen starts to flicker after logging in for a while


Hello

This is an entirely new issue. My screen starts to flicker after logging in/turning on computer for a while, and/or if I launch an app that uses my Nvidia card (my laptop has Optimus), I'm not exactly sure which of these two causes it. For the first while after a restart, the screen appears fine. The flickering appears on desktop background + internet browser as well, so I'm pretty sure it's not a program compatibility issue. The flickering is not severe (the type that looks like horizontal bars sliding up) but it's an annoyance.

Tried:

• Disabling Windows error reporting + problem reporting service in msconfig
• Restart computer
• Resetting Nvidia global settings to default in Nvidia control panel
• Checking for display drive updates in device manager (all up to date)
• Checking monitor refresh rate (60Hz, can't be changed)

Laptop I'm using:

• i7-4700MQ 2.4GHz
• 1900x1080
• Intel HD 4600 + Nvidia GT750M

Thanks for suggestions.