windows security wont open at all, just a blank screen

Question

Answer 1

Please try these command in admin Command Prompt:

reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies" /f

reg delete "HKLM\Software\Microsoft\WindowsSelfHost" /f

reg delete "HKLM\Software\Policies" /f

reg delete "HKLM\Software\WOW6432Node\Microsoft\Policies" /f

reg delete "HKLM\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Policies" /f

reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware

reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies" /f

reg delete "HKCU\Software\Microsoft\WindowsSelfHost" /f

reg delete "HKCU\Software\Policies" /f

reg delete "HKLM\Software\Microsoft\Policies" /f

Once executed, restart the system.

Let us know if this helps!

Answer 2

Hi, good day!

• Are you using a personal, school or work account?
• When was the last time it worked properly?

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Please try to download and make sure to run securityhealthsetup.exe as administrator in the support article in the link below. If it doesn't work, please try to restart your computer and wait a few minutes for it to start before checking,

https://support.microsoft.com/en-us/topic/windows-security-app-update-a6ac7d2e-b1bf-44c0-a028-41720a242da3

I look forward to receiving your update and I'm willing to collaborate with you till we resolve the issue. Do keep me informed by clicking "Add comment" below.