Obviously it works for many others, so the obvious truth is that it does not work for YOU but about thousands of others.
It depends on your installed software, windows version, updates of windoes, antivirus, and java installations as well as network stack, drivers and and and...
Who knows what tools or maybe even malware you have on your system
If you do not want to take the time to investigate it further: Well, your choice.
If you don't have the skills to check it any further: I cannot help either from here. But I recommand you to search online for others with similar problems, and most of the time you'll find a solution.
If you decide for yourself it's not worth the effort or time: Go on with manual installation, it's valid. But please don't forget to update the dependencies of the addons as well each time!