In short, this file is an all-in-one installer for plus NetBeans IDE 8.2 (or a variant close to 8.2). It was officially distributed by Oracle around late 2016.

Since Oracle and Apache (the current maintainers of NetBeans) have moved to newer versions, the official bundle link is often broken or leads to a 404 error. You can find this specific installer through these sources: Oracle Forums Official Oracle Archive : Access the Java SE 8 Archive Downloads . You will need to create a free Oracle account and log in to download legacy files. Internet Archive (Wayback Machine)

: You must run the .exe as an administrator on your Windows system.

Ensure you have at least 1 GB of RAM and 750 MB of free disk space.