If you're using Windows, try doing it this way:

First of all, install Java. Download the JRE offline installer & remove any other Java versions installed (Add/Remove Programs) before installing this one.
Java SE Downloads

After you install Java, restart your computer.

Now install LW & make sure to use the offline installer there (when you click to download the installer & a dialog box pops up, cancel that...then use the option to download the offlilne installer)
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