Hi Jomari,

Unfortunately you were scammed. LW basic is absolutely free & you can download a clean version from the official site here.
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There's not much you can do after nearly 2 years...just put it down to experience & in future, only use the official site

After you've installed the Java JRE, then install LW. Use the offline installer...when you go to the LW download page & click to download, a box will pop up asking you if you want to save the file. Click cancel & then you'll see an option to download with the offline installer...do that

I'm a bit confused, do you have any version of LW installed now?

Don't use Norton firewall & Windows firewall together. Configure Norton to allow LW & disable the Windows firewall. Firefox doesn't have a firewall.

That modem sounds like an internal one! Do you have an external modem or router?