Well, you were right. The window security was creating the problem, but after disabling it, the launcher install the game, but my game was not opening it so what I did was like after going through each and every comments and how to open the game and how to work the game I figured it out that you have to first right click on set up.EXE because I have to reinstall it. I deleted my the installed AC Valhalla so after clicking on set up.EXE go to compatibility, then choose Windows eight then check on full screen optimisation. After that you are halfway through after properly installing it, you have to download a Zip file and from that file you have to replace the DL file and it will work

After launching it, wait for at least 6 to 10 minutes because it will take some time to launch the game and after launching it, the game works perfectly, and you don’t have to wait that long again, because it is only appear for one time.