Windows saves tracking data on files downloaded from the Internet. If you copy paste a file and see stuff like this in your project:

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        public/assets/check.svg
        public/assets/check.svg:Zone.Identifier
        public/assets/spinner.png
        public/assets/spinner.png:Zone.Identifier
        public/assets/spinner.svg
        public/assets/spinner.svg:Zone.Identifier

...It will annoy you.

To remove the problem: Run gpedit.msc (Win + R) and go to:

User configuration

> Administrative templates

>Windows Components

> Attachment Manager and set Do not preserve zone information in file attachments. (to run gpedit.msc you’ll need Windows Professional)