在我所有的浏览器中 Windows 10 更新 2004 后奇怪的本地主机证书问题！ 我怎样才能解决这个问题？

Question

I'm working on my project with SSL-enabled in Visual Studio 2019 16.7.3, everything was ok; Yesterday I updated my Windows 10 to version 2004 build 19041.508 and after that, any projects with localhost certificate goes wrong! I created a project with default asp.net core template and it has the same error.

Testing with Google Chrome v85, Firefox v80, Edge, IE, Brave.

I tried some ways in SO and other links found in google, but nothing could fix my problem! Some of them are :

• Deleting ".vs" hidden folder and obj folder
• Clearing all localhost certificates in my computer (UserCertificates, ComputerCertificates) and generating again (VS prompts to create it)
• Disabling my Internet Security features (to don't intercept any HTTPS connections!)
• Uninstalling the VS and installing again
• netsh winsock reset
• Testing with Kestrel and IIS Express
• And some other ways...

BTW, I can't find any error details or logs for this.

Answer 1

I had the exact issue and was about to attempt reinstalling VS2019 out of desperation. A colleague of mine suggested to repair the VS installation instead, which I did. Then after building and starting one of my projects, I was prompted with this:

After clicking yes, I got another dialog asking me to accept the self signed certificate from IISExpress. And then everything went back to normal for me.

But if this doesn't work, another workaround I can suggest is to get your solution running in VS code. It worked for me but not with all my projects.

Answer 2

It turned out that Kaspersky was responsible for this: I upgraded my Kaspersky to a new version (21.2.16.590) and now my problem is fixed

Kaspersky SSL issue on localhost

Answer 3

run as admin CMD or PowerShell then go to C:\\Program Files (x86)\\IIS Express address with cd Command Prompt then write this command:

PS C:\Program Files (x86)\IIS Express> ./IisExpressAdminCmd.exe setupsslUrl -url:https://localhost:"Your port number for ssl"/ -UseSelfSigned

then rebuild and run your project.