If you want specific pages to require a login, then you can use .htaccess and .htpasswd (check related links below for more info)
If you want to make your own login, linked to a database, you'll have to use another language, like PHP. (you can find a video tutorial in the related links)
If you mean how to create a login code with HTML, you need a tag called and a tag called and something in another programming language, such as php or java. There is no login code necessary to use HTML.
It is very easy use HTML code.
To customize the Windows 10 login screen pictures, you can use the Settings app to change the background image or use third-party software to personalize the login screen further.
You can create HTML in microsoft notepad, but a good option is Dreamweaver.
Use Logon studio, btw its not a virus
To customize the appearance of the Windows 10 login screen images, you can change the background image by going to Settings Personalization Lock screen. You can also use third-party software or tools to further customize the login screen, such as Windows 10 Login Background Changer or Tweaks.com Logon Changer.
To create a website
The ASP stands for active server pages. It is a type of scripting. Login scripts normally use them to communicate with the login server easily. It is easier and more effective than HTML.
People use it to create websites
You need some type of HTML editor to create a website. Once you have the HTML editor, you need to learn how to use HTML to see what kind of content that needs to be created.
Try to use the Safe mode and check logs for any errors. If you are not able to start the Safe mode most likely you will have to reinstall the OS.
HTML - Hyper Text Markup Language is a computer programming language which can be used to create webpages/websites.